I've an interesting thought here based on Dreamliner's Hedge and Correlation System. If somebody can develop a grid ea which generates grid of simultaneous buy-sell and sell-buy orders of highly correlated pair trades with a set take profit target. Normally a grid system works very well in ranging or weak market and by selecting a highly correlated pair we'll be simulating the conditions of ranging/weak market conditions which can have possibility of very good results. Pairs selection will be the key to success in this approach, we need to have a market neutral basket. I'm not a programmer but I'm sure somebody will come forward to code this and take the discussion forward. Look forward to hearing from you guys what you think about it.