Simplistically, set a maximum position aligned to those precautions which ensure that any unexpected loss cannot damage your intended program of capital accumulation (ie continuously adding net profit or net gain).Quote from Trish:
$ Same amount-every trade.

Quote from Buy1Sell2:
I don't agree with 50 to 1 whether daytrading or position trading. I think that is unbelievably poor judgement. Sorry, it's just the way I feel.
Note: If that 50 to 1 is only in the trading account and is actually more like 3 to 1 when compared to total liquid net worth, then I might be able to see it.
Quote from Buy1Sell2:
I don't agree with 50 to 1 whether daytrading or position trading. I think that is unbelievably poor judgement. Sorry, it's just the way I feel.
Note: If that 50 to 1 is only in the trading account and is actually more like 3 to 1 when compared to total liquid net worth, then I might be able to see it.

Quote from mschey:
The first rule is to never globalize. Those of us who understand our trading strategy and leverage, can use 50:1 or more and only risk a loss of 10% on our accounts, and that's our a worse case scenario that happens once in 18 months or so.
You pay a heavy price for being too conservative. Work on stretching your "risk" muscle a little very day, that's my general philosophy towards trading.