The Best result that any system has given to me till now is : The System based on PivotHigh and PivotLow (as suggested by SAINT). Go long when the price crosses latest PivotHigh. Go short when price crossed latest PivotLow. Use 20 minute timeframe (20 min timeframe is best while backtesting).
You will be amazed by the result.. Backtest it on AB. It will give you 200% return per annum without any leverage!!!
And yes..... This does not use any ZigZag