You should always have target of what you can lose. You can allocate 1 to 3 percent of total account risk to all positions. The bigger the account, the lower the risk applied for me.
Okay but do you bend rules? For example lets say a set up occurs and you a very confident in your assertion/bias on a trade, do you then allocate a higher percentage to this trade because of your confidence? I know its bad when you think you know something but I know you understand what I generally mean.
Depending on account size. Account of over a million dollar, I will not risk more than 5% if i seem too over sure and want to go for all, account of 100k and 500k, I have risked max 10% on both, and it was a good pay as I made over 37%.'risk management' is a misnomer... if you are 90% sure on a bet, you should go all in on margin... but if you are only 60% sure then you should bet 5% of the account... I'd call it 'odds management'.
Ed Thorp preached trading fractional Kelly. For most of us, assuming positive expectancy, that => ~1% - 2% each bet (trade).Professional traders that make a living at it typically risk no more than 1% on most of their trades, on a few fat pitch trades they will go up to 2%.
Edward Thorp is a math legend that beat the casino's playing blackjack and went on to a legendary trader. He states that betting more than 2% on trades puts you on a certain road to ruin, saying it's only a matter of time.
The 1-2% risk per trade is the one thing that virtually every pro trader that has any awareness on risk mgmt all agree with. Pro gamblers follow this as well, in fact this is where it originally came from.