The support forum is built with (1) a Q&A format for common trading queries received from wannabe and experienced traders, and (2) a standard forum for course video topics. How to Trade Price Action and How to Trade Forex Price Action videos are consolidated into common forums.
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Video 30E Slides 7 & 12
How do we go from a 40 % probability of the market moving X units in one direction before X units in other direction, to 40% probability of the market moving two times X units in one direction before moving X units in the other direction (necessary for positive trader's equation)?
They are two different probabilities: the first being the probability for an equidistant move and the second the chances that a setup works. We mainly use the latter when trading but the former can help (I personally don't use it). Both probabilities are coincident when you have a high probability setup but differ when the setup is low probability.
Thanks Ludopuig for clearing that up.