If you trade with protective stop-loss orders, you should amend the order to reflect the change in trade size and raise or lower the stop price, depending on whether its a long or short position, to your original itiating trade entry price. You now are essentially playing with the houses money. You cant lose on the remaining position, and thats obviously a fantastic position in which to put yourself. Place a limit order a few tics above or below the market, depending on your position, sit back and relax.