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If price is a random walk, is ok to use the binomial distribution to estimate a trading stra...

Is it OK to assume a trading strategy should have a binomial distribution if the price is just a random walk? … I was thinking in using the binomial as reference, in that example n=30, p=0.5, and k=20, it gives the probability of k to n (k>=20) of 2% So we could say there are 2% of chance the strategy is giving …
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