you have to bet

 in trading you can never sure of the outcome of the trade. never. there is always some uncertainty. 

but you can't be indecisive and shaky.... fearing, vibrating, panicking all the time, fiddling with the trade direction.

you have to bet. and have guts to stick to it. 

you have to be ok with losing. only that will give you the guts to be worthy claimant of profit, handsome profit.

and since you have to be ok with loss, you have to manage the risk. can't be foolish gambler.