i dont use ea
i check the correlation and the spread between 2 positively correlated pairs and trade when the spread is low or high. buy one sell the other or vice versa

its basically trading a cross. like in usdchf and usdjpy basically its trading chfjpy. but with trading 2 pairs to be honest its just a psychological thing. i prefer it rather than trading one pair. its not any safer than trading the cross. it could work well with pairs like eurusd and gbpusd because eurgbp doesnt move much but ur better off trading eurgbp.

its nothing but an alternate to trading crosses.