How To Use 200 SMA With This Forex Strategy Now as an added measure to ensure you only trade with the main trend, the 200 SMA can be used a further filter. if 10 and 20 sma are above the 200 SMA only take long positions. if 10 and 20 sma are below the 200 SMA only take short positions. 200 EMA Forex Trading Strategy. The 200 EMA Forex Trading Strategy is a very easy to implement and manage Forex strategy. As the name suggests, similar to the M30 EMA trading system, or the 260 EMA Swing Forex strategy, 200 EMA system is based on 200 period Exponential Moving averages. Your core job is to follow the trend principles: buying low, and selling high. In my experience using this strategy i dont need antoher indicators sir..just 2 moving average only and this is make me comfort also chart to be clean.just buy if ema 5 crossing up SMA 200 with stoplose 50 pips and takeprofit 100 pips and sell if EMA 5 crossing down SMA 200 with the same stoplose and take profit aswell in 4 pairs..EURUSD,GBPUSD,EURJPY,GBPJPY at H1 timeframe.and use good money management