The Moving Average Channel System is used for GBPUSD, the rules are very simple. Backtest shows 79% annual return if each trade risks 2% of your account.
(1) When EMA13 typical price rises 10 pips or more than 10 pips, buy at EMA13. Stop Loss and Take Profit are 50 and 300 pips respectively.
(2) When EMA13 typical price decreases 15 pips or more than 15 pips, sell at EMA13. Stop Loss and Take Profit are 50 and 300 pips respectively.
As STOP LOSS is 50 pips, if you want to control the risk of each trade under 2.00%, the actual leverage should be 1:4. As Take Profit is 300 pips, this means the potential reward of each trade is 12%. In the backtest the annual trade is 36, and the winning ratio is 0.3, then the annual return based on the backtest is
36 x0.3x0.12-36x0.7x0.02= 79.20%