Quote from fluttrader:
How much difference in results does it make in your trading ?
Unless you are just a scalper, by scaling out and moving the stop to breakeven you will always increase your % win rate. One of the worst mistakes a trader can make is letting a winner turn into a loser. On any given trade you have no idea how far it can go in the money. By scaling out some you reduce your losses if the trade goes back against you but also limit your gains but the theory behind a proper scale out strategy is the gain lost on not having the full position is less than the gain made on the scaled out trades that would have turned back to net losers had you not scaled out.
