Note the key difference in the chart scaling, where each 1000-point increment gets equal spacing. In my opinion, the arithmetic chart offers a much more accurate view of what is happening. As we shall see, this precision is very important in the anticipation of future price. Let's look now at a weekly chart of the Nasdaq, to determine when price falls to the trendline. The chart here is in Logarithmic mode.
Chances are, there is nowhere to go now, but up.
Not so fast. Now look at the arithmetic chart. We haven't even reached the trendline yet. Optimism suddenly turns to caution. The problem we face is that various books and websites may use one or the other method of scaling.