Quote from hypostomus:
...scaling in and out is pussy. For any given strategy, there is one and only one optimum entry, stop exit, and profit exit. Any variation from that is suboptimal and makes less money. Bet the whole wad at once, and take it off all at once! (Unless your size gives you poor fills, which is another issue.)

Quote from hypostomus:
I allocate one fifth of the account to each of the five systems I trade and put on the full allocated amount if and when each system calls a trade.