I'm trading with a very tight TP no SL and no more than 4 steps. I watch it like a hawk and never leave it to just run on auto. If the grid reaches the fourth step (initial position plus 3 addition positions) I will disable live trading and and place a 100 pip SL then manually manage the open positions until either the take profit or the stop loss is hit. Then I enable live trading on the expert advisor again. Personally I trade EURUSD, AUDUSD and NZDUSD...that's enough to keep my eye on! By trading this way you can trade larger lots.
Too much agreement kills a chat.