<PAGE>   1
                                                                    EXHIBIT 10.7

                          OPTIMARK TECHNOLOGIES, INC.

                                1999 STOCK PLAN

                             STOCK OPTION AGREEMENT

Unless otherwise defined herein, the terms defined in the 1999 Stock Plan shall
have the same defined meanings in this Stock Option Agreement.

     1.      NOTICE OF STOCK OPTION GRANT

         [OPTIONEE'S NAME AND ADDRESS]

The undersigned Optionee has been granted an Option to purchase Common Stock of
the Company, subject to the terms and conditions of the Plan and this Option
Agreement, as follows:

<TABLE>
<S>                                                <C>
Date of Grant
                                                   -----------------------------------------------

Vesting Commencement Date
                                                   -----------------------------------------------

Exercise Price per Share                           $
                                                    ----------------------------------------------

Total Number of Shares Granted
                                                   -----------------------------------------------

Total Exercise Price                               $
                                                    ----------------------------------------------

Type of Option:                                    ___      Incentive Stock Option

                                                   ___      Nonstatutory Stock Option

Term/Expiration Date:                              Ten (10) years from the Date of Grant
</TABLE>

Vesting Schedule:

This Option shall be exercisable, in whole or in part, according to the
following vesting schedule:

The Shares subject to the Option shall vest in five (5) successive equal annual
installments measured from the Vesting Commencement Date, subject to Optionee's
continuing to be a Service Provider on such dates.

Termination Period:

Upon Optionee's termination as a Service Provider for any reason, all unvested
Shares then subject to the Option shall immediately terminate and cease to be
outstanding.  In the event of Optionee's termination as a Service Provider for
any reason other than Disability or death, the vested portion of






<PAGE>   2
the Option shall be exercisable for 30 days after Optionee ceases to be a
Service Provider.  In the event of Optionee's termination as a Service Provider
by reason of Disability, the vested portion of the Option may be exercised for
one year after Optionee ceases to be a Service Provider.  In the event of
Optionee's termination as a Service Provider by reason of death, the vested
portion of the Option may be exercised for six months after Optionee ceases to
be a Service Provider.

In no event, however, may Optionee exercise this Option after the
Term/Expiration Date as provided above.

     2.      AGREEMENT

          (a)        Grant of Option.  The Plan Administrator of the
Company hereby grants to the Optionee named in the Notice of Grant (the
"Optionee"), an option (the "Option") to purchase the number of Shares set
forth in the Notice of Grant, at the exercise price per Share set forth in the
Notice of Grant (the "Exercise Price"), and subject to the terms and conditions
of the Plan, which is incorporated herein by reference.  Subject to Section
16(c) of the Plan, in the event of a conflict between the terms and conditions
of the Plan and this Option Agreement, the terms and conditions of the Plan
shall prevail.

         If designated in the Notice of Grant as an Incentive Stock Option
("ISO"), this Option is intended to qualify as an Incentive Stock Option as
defined in Section 422 of the Code.  Nevertheless, to the extent that it
exceeds the $100,000 rule of Code Section 422(d), that portion of this Option
shall be treated as a Nonstatutory Stock Option ("NSO").

          (b)        Exercise of Option.

                  (i)             Right to Exercise.  This Option shall be
exercisable during its term in accordance with the Vesting Schedule set out in
the Notice of Grant and with the applicable provisions of the Plan and this
Option Agreement.

                  (ii)            Method of Exercise.  This Option shall be
exercisable by delivery of an exercise notice in the form attached as Exhibit A
(the "Exercise Notice") which shall state the election to exercise the Option,
the number of Shares with respect to which the Option is being exercised, and
such other representations and agreements as may be required by the Company.
The Exercise Notice shall be accompanied by payment of the aggregate Exercise
Price as to all Shares for which said Option is being exercised.  This Option
shall be deemed to be exercised upon receipt by the Company of such fully
executed Exercise Notice accompanied by the aggregate Exercise Price.

No Shares shall be issued pursuant to the exercise of an Option unless such
issuance and such exercise complies with Applicable Laws.  Assuming such
compliance, for income tax purposes the Shares shall be considered transferred
to the Optionee on the date on which the Option is exercised with respect to
such Shares.

          (c)        Optionee's Representations.  In the event the Shares have
not been registered under the Securities Act of 1933, as amended, at the time
this Option is exercised, the Optionee shall, if required by the Company,
concurrently with the exercise of all or any portion of this Option,





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<PAGE>   3
deliver to the Company his or her Investment Representation Statement in the
form attached hereto as Exhibit B.

          (d)        Lock-Up Period.  Optionee hereby agrees that, if so
requested by the Company or any representative of the underwriters (the
"Managing Underwriter") in connection with any registration of the offering of
any securities of the Company under the Securities Act, Optionee shall not sell
or otherwise transfer any Shares or other securities of the Company during the
180-day period (or such other period as may be requested in writing by the
Managing Underwriter and agreed to in writing by the Company) (the "Market
Standoff Period") following the effective date of a registration statement of
the Company filed under the Securities Act.  Such restriction shall apply only
to the first registration statement of the Company to become effective under
the Securities Act that includes securities to be sold on behalf of the Company
to the public in an underwritten public offering under the Securities Act.  The
Company may impose stop-transfer instructions with respect to securities
subject to the foregoing restrictions until the end of such Market Standoff
Period.

          (e)        Method of Payment.  Payment of the aggregate Exercise
Price shall be by any of the following, or a combination thereof, at the
election of the Optionee:

                   (i)            cash or check;

                  (ii)            consideration received by the Company under a
formal cashless exercise program adopted by the Company in connection with the
Plan; or

                  (iii)           beginning on the date that the Common Stock
is first registered under Section 12 of the Exchange Act, other Shares which
(A) in the case of Shares acquired upon exercise of an option, have been owned
by the Optionee for more than six months on the date of surrender, and (B) have
a Fair Market Value on the date of surrender equal to the aggregate exercise
price of the Shares as to which said Option shall be exercised.

          (f)        Restrictions on Exercise.  This Option may not be
exercised until such time as the Plan has been approved by the shareholders of
the Company, or if the issuance of such Shares upon such exercise or the method
of payment of consideration for such shares would constitute a violation of any
Applicable Law.

          (g)        Non-Transferability of Option.  This Option may not be
transferred in any manner otherwise than by will or by the laws of descent or
distribution and may be exercised during the lifetime of Optionee only by
Optionee.  The terms of the Plan and this Option Agreement shall be binding
upon the executors, administrators, heirs, successors and assigns of the
Optionee.

          (h)        Term of Option.  This Option may be exercised only within
the term set out in the Notice of Grant, and may be exercised during such term
only in accordance with the Plan and the terms of this Option.

          (i)        Tax Consequences.  Set forth below is a brief summary as
of the date of this Option of some of the federal tax consequences of exercise
of this Option and disposition of the Shares.  THIS SUMMARY IS NECESSARILY
INCOMPLETE, AND THE TAX LAWS AND





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<PAGE>   4
REGULATIONS ARE SUBJECT TO CHANGE.  THE OPTIONEE SHOULD CONSULT A TAX ADVISER
BEFORE EXERCISING THIS OPTION OR DISPOSING OF THE SHARES.

                  (i)             Exercise of NSO.  There may be a regular
federal income tax liability upon the exercise of an NSO.  The Optionee will be
treated as having received compensation income (taxable at ordinary income tax
rates) equal to the excess, if any, of the Fair Market Value of the Shares on
the date of exercise over the Exercise Price.  If Optionee is an Employee or a
former Employee, the Company will be required to withhold from Optionee's
compensation or collect from Optionee and pay to the applicable taxing
authorities an amount in cash equal to a percentage of this compensation income
at the time of exercise, and may refuse to honor the exercise and refuse to
deliver Shares if such withholding amounts are not delivered at the time of
exercise.

                  (ii)            Exercise of ISO.  If this Option qualifies as
an ISO, there will be no regular federal income tax liability upon the exercise
of the Option, although the excess, if any, of the Fair Market Value of the
Shares on the date of exercise over the Exercise Price will be treated as an
adjustment to the alternative minimum tax for federal tax purposes and may
subject the Optionee to the alternative minimum tax in the year of exercise.

                  (iii)           Disposition of Shares.  In the case of an
NSO, if Shares are held for at least one year, any gain realized on disposition
of the Shares will be treated as long-term capital gain for federal income tax
purposes.  In the case of an ISO, if Shares transferred pursuant to the Option
are held for at least one year after exercise and of at least two years after
the Date of Grant, any gain realized on disposition of the Shares will also be
treated as long-term capital gain for federal income tax purposes.  If Shares
purchased under an ISO are disposed of within one year after exercise or two
years after the Date of Grant, any gain realized on such disposition will be
treated as compensation income (taxable at ordinary income rates) to the extent
of the difference between the Exercise Price and the lesser of (1) the Fair
Market Value of the Shares on the date of exercise, or (2) the sale price of
the Shares.  Any additional gain will be taxed as capital gain, short-term or
long-term depending on the period that the ISO Shares were held.

                  (iv)            Notice of Disqualifying Disposition of ISO
Shares.  If the Option granted to Optionee herein is an ISO, and if Optionee
sells or otherwise disposes of any of the Shares acquired pursuant to the ISO
on or before the later of (1) the date two years after the Date of Grant, or
(2) the date one year after the date of exercise, the Optionee shall
immediately notify the Company in writing of such disposition.  Optionee agrees
that Optionee may be subject to income tax withholding by the Company on the
compensation income recognized by the Optionee.

          (j)        Entire Agreement; Governing Law.  The Plan is incorporated
herein by reference.  The Plan and this Option Agreement constitute the entire
agreement of the parties with respect to the subject matter hereof and
supersede in their entirety all prior undertakings and agreements of the
Company and Optionee with respect to the subject matter hereof, and may not be
modified adversely to the Optionee's interest except by means of a writing
signed by the Company and Optionee.  This agreement is governed by the internal
substantive laws but not the choice of law rules of New Jersey.





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<PAGE>   5
          (k)        No Guarantee of Continued Service.  OPTIONEE ACKNOWLEDGES
AND AGREES THAT THE VESTING OF SHARES PURSUANT TO THE VESTING SCHEDULE HEREOF
IS EARNED ONLY BY CONTINUING AS A SERVICE PROVIDER AT THE WILL OF THE COMPANY
(NOT THROUGH THE ACT OF BEING HIRED, BEING GRANTED THIS OPTION OR ACQUIRING
SHARES HEREUNDER). OPTIONEE FURTHER ACKNOWLEDGES AND AGREES THAT THIS
AGREEMENT, THE TRANSACTIONS CONTEMPLATED HEREUNDER AND THE VESTING SCHEDULE SET
FORTH HEREIN DO NOT CONSTITUTE AN EXPRESS OR IMPLIED PROMISE OF CONTINUED
ENGAGEMENT AS A SERVICE PROVIDER FOR THE VESTING PERIOD, FOR ANY PERIOD, OR AT
ALL, AND SHALL NOT INTERFERE IN ANY WAY WITH OPTIONEE'S RIGHT OR THE COMPANY'S
RIGHT TO TERMINATE OPTIONEE'S RELATIONSHIP AS A SERVICE PROVIDER AT ANY TIME,
WITH OR WITHOUT CAUSE.

Optionee acknowledges receipt of a copy of the Plan and represents that he or
she is familiar with the terms and provisions thereof, and hereby accepts this
Option subject to all of the terms and provisions thereof.  Optionee has
reviewed the Plan and this Option in their entirety, has had an opportunity to
obtain the advice of counsel prior to executing this Option and fully
understands all provisions of the Option.  Optionee hereby agrees to accept as
binding, conclusive and final all decisions or interpretations of the
Administrator upon any questions arising under the Plan or this Option.
Optionee further agrees to notify the Company upon any change in the residence
address indicated below.

<TABLE>
<S>                                                         <C>
OPTIONEE                                                    OPTIMARK TECHNOLOGIES, INC.

---------------------------------------------------         ------------------------------------------------------
Signature                                                   By


---------------------------------------------------         ------------------------------------------------------
Print Name                                                  Title


---------------------------------------------------

---------------------------------------------------
Residence Address
</TABLE>





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<PAGE>   6
                                   EXHIBIT A

                                1999 STOCK PLAN

                                EXERCISE NOTICE

OptiMark Technologies, Inc.

[Address]

Attention: [Title]

         1.      Exercise of Option.  Effective as of today, ___________, 20__,
the undersigned ("Optionee") hereby elects to exercise Optionee's option to
purchase _________ shares of the Common Stock (the "Shares") of OptiMark
Technologies, Inc. (the "Company") under and pursuant to the 1999 Stock Plan
(the "Plan") and the Stock Option Agreement dated ________, 20______(the
"Option Agreement").

         2.      Delivery of Payment.  Purchaser herewith delivers to the
Company the full purchase price of the Shares, as set forth in the Option
Agreement.

         3.      Representations of Optionee.  Optionee acknowledges that
Optionee has received, read and understood the Plan and the Option Agreement
and agrees to abide by and be bound by their terms and conditions. Optionee
also acknowledges that Optionee has received, read and understood that
documents entitled "Risks Associated with Purchasing OptiMark Common Stock",
"OptiMark Technologies, Inc. Employee Stock Options" and certain financial
information regarding the Company.

         4.      Rights as Shareholder.  Until the issuance of the Shares (as
evidenced by the appropriate entry on the books of the Company or of a duly
authorized transfer agent of the Company), no right to vote or receive
dividends or any other rights as a shareholder shall exist with respect to the
Optioned Stock, notwithstanding the exercise of the Option.  The Shares shall
be issued to the Optionee as soon as practicable after the Option is exercised.
No adjustment shall be made for a dividend or other right for which the record
date is prior to the date of issuance except as provided in Section 14 of the
Plan.

         5.       Tax Consultation.  Optionee understands that Optionee may
suffer adverse tax consequences as a result of Optionee's purchase or
disposition of the Shares.  Optionee represents that Optionee has consulted
with any tax consultants Optionee deems advisable in connection with the
purchase or disposition of the Shares and that Optionee is not relying on the
Company for any tax advice.

         6.      Restrictive Legends and Stop-Transfer Orders.






<PAGE>   7

                 (a)      Legend.  Optionee understands and agrees that the
Company shall cause the legend set forth below or a legend substantially
equivalent thereto, to be placed upon any certificate(s) evidencing ownership
of the Shares together with any other legends that may be required by the
Company or by state or federal securities laws:

                THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED
                UNDER THE SECURITIES ACT OF 1933 (THE "ACT") AND MAY NOT BE
                OFFERED, SOLD OR OTHERWISE TRANSFERRED, PLEDGED OR HYPOTHECATED
                UNLESS AND UNTIL REGISTERED UNDER THE ACT OR, IN THE OPINION OF
                COMPANY COUNSEL SATISFACTORY TO THE ISSUER OF THESE SECURITIES,
                SUCH OFFER, SALE OR TRANSFER, PLEDGE OR HYPOTHECATION IS IN
                COMPLIANCE THEREWITH.



                 (b)      Stop-Transfer Notices.  Optionee agrees that, in
order to ensure compliance with the restrictions referred to herein, the
Company may issue appropriate "stop transfer" instructions to its transfer
agent, if any, and that, if the Company transfers its own securities, it may
make appropriate notations to the same effect in its own records.

                 (c)      Refusal to Transfer.  The Company shall not be
required (i) to transfer on its books any Shares that have been sold or
otherwise transferred in violation of any of the provisions of this Exercise
Notice or (ii) to treat as owner of such Shares or to accord the right to vote
or pay dividends to any purchaser or other transferee to whom such Shares shall
have been so transferred.

         7.      Successors and Assigns.  The Company may assign any of its
rights under this Exercise Notice to single or multiple assignees, and this
Exercise Notice shall inure to the benefit of the successors and assigns of the
Company.  Subject to the restrictions on transfer herein set forth, this
Exercise Notice shall be binding upon Optionee and his or her heirs, executors,
administrators, successors and assigns.

         8.      Interpretation.  Any dispute regarding the interpretation of
this Exercise Notice shall be submitted by Optionee or by the Company forthwith
to the Administrator which shall review such dispute at its next regular
meeting.  The resolution of such a dispute by the Administrator shall be final
and binding on all parties.

         9.      Governing Law; Severability.  This Exercise Notice is governed
by the internal substantive laws but not the choice of law rules, of New
Jersey.

         10.      Entire Agreement.  The Plan and Option Agreement are
incorporated herein by reference.  This Exercise Notice, the Plan, the Option
Agreement and the Investment Representation Statement constitute the entire
agreement of the parties with respect to the subject matter hereof and
supersede in their entirety all prior undertakings and agreements of the
Company and Optionee with respect to the subject matter hereof, and may not be
modified adversely to the Optionee's interest except by means of a writing
signed by the Company and Optionee.

<TABLE>
<S>                                                         <C>
Submitted by:                                               Accepted by:
</TABLE>






<PAGE>   8
<TABLE>
<S>                                                         <C>
OPTIONEE                                                    OPTIMARK TECHNOLOGIES, INC.


---------------------------------------------------         ------------------------------------------------------
Signature                                                   By


---------------------------------------------------         ------------------------------------------------------
Print Name                                                  Title

Address:                                                    Address:
-------                                                     -------

---------------------------------------------------         ------------------------------------------------------

---------------------------------------------------         ------------------------------------------------------

                                                            ------------------------------------------------------
                                                            Date Received
</TABLE>






<PAGE>   9

                                   EXHIBIT B

                      INVESTMENT REPRESENTATION STATEMENT

OPTIONEE:

COMPANY:                  OPTIMARK TECHNOLOGIES, INC.

SECURITY:                 COMMON STOCK

AMOUNT:

DATE:

In connection with the purchase of the above-listed Securities, the undersigned
Optionee represents to the Company the following:

         (a)     Optionee is aware of the Company's business affairs and
financial condition and has acquired sufficient information about the Company
to reach an informed and knowledgeable decision to acquire the Securities.
Optionee is acquiring these Securities for investment for Optionee's own
account only and not with a view to, or for resale in connection with, any
"distribution" thereof within the meaning of the Securities Act of 1933, as
amended (the "Securities Act").

         (b)     Optionee acknowledges and understands that the Securities
constitute "restricted securities" under the Securities Act and have not been
registered under the Securities Act in reliance upon a specific exemption
therefrom, which exemption depends upon, among other things, the bona fide
nature of Optionee's investment intent as expressed herein.  In this
connection, Optionee understands that, in the view of the Securities and
Exchange Commission, the statutory basis for such exemption may be unavailable
if Optionee's representation was predicated solely upon a present intention to
hold these Securities for the minimum capital gains period specified under tax
statutes, for a deferred sale, for or until an increase or decrease in the
market price of the Securities, or for a period of one year or any other fixed
period in the future.  Optionee further understands that the Securities must be
held indefinitely unless they are subsequently registered under the Securities
Act or an exemption from such registration is available and as such Optionee
acknowledges that Optionee must bear the economic risk of the investment for an
indefinite period of time. Optionee further acknowledges and understands that
the Company is under no obligation to register the Securities.  Optionee
understands that the certificate evidencing the Securities will be imprinted
with a legend which prohibits the transfer of the Securities unless they are
registered or such registration is not required in the opinion of counsel
satisfactory to the Company, and any other legend required under applicable
state securities laws.

         (c)     Optionee is familiar with the provisions of Rule 701 and Rule
144, each promulgated under the Securities Act, which, in substance, permit
limited public resale of "restricted securities" acquired, directly or
indirectly from the issuer thereof, in a non-public offering subject to the






<PAGE>   10

satisfaction of certain conditions. Rule 701 provides that if the issuer
qualifies under Rule 701 at the time of the grant of the Option to the
Optionee, the exercise will be exempt from registration under the Securities
Act.  In the event the Company becomes subject to the reporting requirements of
Section 13 or 15(d) of the Securities Exchange Act of 1934, ninety (90) days
thereafter (or such longer period as any market stand-off agreement may
require) the Securities exempt under Rule 701 may be resold, subject to the
satisfaction of certain of the conditions specified by Rule 144, including:
(1) the resale being made through a broker in an unsolicited "broker's
transaction" or in transactions directly with a market maker (as said term is
defined under the Securities Exchange Act of 1934); and, in the case of an
affiliate, (2) the availability of certain public information about the
Company, (3) the amount of Securities being sold during any three month period
not exceeding the limitations specified in Rule 144(e), and (4) the timely
filing of a Form 144, if applicable.

         In the event that the Company does not qualify under Rule 701 at the
time of grant of the Option, then the Securities may be resold in certain
limited circumstances subject to the provisions of Rule 144, which requires the
resale to occur not less than one year after the later of the date the
Securities were sold by the Company or the date the Securities were sold by an
affiliate of the Company, within the meaning of Rule 144; and, in the case of
acquisition of the Securities by an affiliate, or by a non-affiliate who
subsequently holds the Securities less than two years, the satisfaction of the
conditions set forth in sections (1), (2), (3) and (4) of the paragraph
immediately above.

         (d)     Optionee further understands that in the event all of the
applicable requirements of Rule 701 or 144 are not satisfied, registration
under the Securities Act, compliance with Regulation A, or some other
registration exemption will be required; and that, notwithstanding the fact
that Rules 144 and 701 are not exclusive, the Staff of the Securities and
Exchange Commission has expressed its opinion that persons proposing to sell
private placement securities other than in a registered offering and otherwise
than pursuant to Rules 144 or 701 will have a substantial burden of proof in
establishing that an exemption from registration is available for such offers
or sales, and that such persons and their respective brokers who participate in
such transactions do so at their own risk.  Optionee understands that no
assurances can be given that any such other registration exemption will be
available in such event.



                        Signature of Optionee:


                        ------------------------------------------------------

                        Date:                                          , 20
                             ------------------------------------------    ----




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