This is probably one of the most important question for traders.
We make it as simple as possible.
Take about day trading or scalping.
Whenever there is continuation or reversal signal,
simply pull the trigger immediately,
simply take it without hesitation,
without extensive and intensive complex analysis.
with no data paralysis problem,
without intercorrelating here and there,
without intracorrelating here and there.
Humans are inherently fearful of loosing $$$. So need to overcome that.
If a market is very jerky/choopy, don't trade that market.
Have a daily max loss limit. Once hit, simply off the computer then go far far away.