This is where mistakes do really start and on the time that they had been wrecked out by the market then this is where realization do happen.Leverage or futures trading is never been simple.
Make yourself that good with spot trading before you do consider on touching up this area because this do really require that knowledge and skills that you do acquire through lots of trading.
Futures trading is never that simple, there will be many complex issues and other things to think about. let alone use leverage unwisely by using high leverage and hope everything goes according to their plan. Even as a professional the use of high leverage will be very high risk.
There is never a strategy that works 100%, I'm sure of it, because every strategy has weaknesses. but it's easy for the OP to say his strategy will work on average 95% to 100%, is he a professional trader?