I agree multiple lot trading is the key to long term forex success .. because you can take profit quickly from one lot and let the other one (or other ones) run for even greater profits.
Bunnygirl, who invented the BGX or bunnygirl cross suggested trading 4 lots -- one to exit at 5-10 pips, one at 20 pips, then stops to b/e so last 2 trades are free .. 3rd one exit at 30 pips and let the last one run with a moving stop as long as it will .. so you can catch those 100-200 or more pip moves when they occur.
If you are so uncertain about a trade that you don't dare put more than one lot on it, probably is not a valid trade to begin with
(Of course I'm talking mini-lots for those with smaller accounts, always keep trades in proportion to your account size!)