You can open trading accounts on as many platforms as you wish. If you’re classified as a pattern day trader on that platform, the $25,000 minimum equity requirement will kick in. If you have multiple accounts, you will have to maintain a $25,000 equity balance in each to day trade within that account. Some people attempt to use multiple accounts as a workaround to the pattern day trader rule. As long as you stay under the four trade per five business days rule for each account, you might not be classified as a pattern day trader in that account. But even if this strategy worked — and there is no guarantee that it would — it also spreads out any funds you have across multiple accounts. This could reduce your returns due to not being able to deploy your funds efficiently for trades you feel confident in since the money won’t be all in one account.