For daytrades i like to keep it very mechanical. For example i want my losses to always be the same amount of risk to my total capital. My wins can run as long as i hit my target or the indicators tell me. Moreso i just want my risk/ reward always adds up at the end of all my trades. So i adjust my lot size to suit rather that capital amount. I guess it all winds up the same in the end whichever way you do it. Cheers!
