The automated trading system which uses multiple pairs (27) on H4. System uses TP, SL, Trailing stops and Break Evens. The lot size based on SL and maximum risk 2.5% but for some pairs risk is less than 2.5%. In one moment my expert can open several trades with different pairs, but only one trade for the currency pair in the current H4 period. In other H4 period IF the expert gets new signal it may open one more trade for same currency pair with own TP SL BE TS. But this is in theory, because it is very rare event. No Martin, No grids in this system.