600 pe and 600 ce
Otherwise, what normally happens is that after making a loss the trader, in his shudder, decides to reduce PS to take a lesser loss or whatever.... then if the trade becomes a winner the result is still negative since his winning trade was on a smaller quantity than the losing one... a negative edge. by keeping PS constant we even the plane.
Same with the bias... we want to even that plane too... do not want too much bias.
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