All we've got, comes down to risk management.... that's our edge, as active traders.
I favor a 'many small trades, tiny stops' approach since you're giving yourself more chances to get it right.
My average scalping daytrading stop loss cost is <$50, for example 400 shares with a .07 trailing or hard stop is very common.
Swingtrading may be up to a few hundred $ stop, eg 100 shares with $2 stop loss.