I just use the basic theory of Automatic Control: Closed Loop. :)In fact, it is nothing special, just combination of indicators(EMA,STO etc) + money management(lot size control etc). I myself is a programmer, so a good coding is also essential. :) Post here is trying to raise up the attention of Automatic Trading Topic,it is still relatively new for retailer traders, I think this is going to be next big thing in the financial world! Also to celebrate for the my past few months hard working to finally rolled out the product!