 Don’t define the risk in advance of putting on a trade.
 Define the risk, but don’t take the loss and it turns into a bigger loss. 
 Hesitate-getting in too late.
 Jump the gun-get in too soon where the signal never actually develops.
 Get out of a winning trade too soon-leave money on the table.
 Let a winning trade turn into a loser without having taken any profit.
 Move a stop closer to an entry point, get stopped out, and market trades back in your favor.