One of the best thing a retailer can do for himself is to keep a log of his activities. You know, make assumptions, then act on it ie buy or sell, feedback or check your assumption(s), change assumptions and act again or not.
The point of keeping a record is to learn from one's mistakes (success is not so informative) and improve for the next round.
I always challenge my beliefs about the "mkt" (lol), how it works, what causes its moves , the plumbings of the mkt ie dark pools, lit exchanges, "conspiracy and manipulation LOL" etc ...
Those beliefs that don't fit the facts I observe I drop.
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