I am a manual trader and I always use stops, not so much to protect me against adverse price moves, but as part of my money management and lot-size calculation.
My stop is based on nearest support/resistance plus a buffer equal to ATR/6. I then calculate pips between stop and current price, then convert to dollars. I apply 2% to my account balance, then divide this value by the dollar value of pips between current price and stop to calculate lot-size. Whether I trade 1 lot or twenty lots, I know that if my stop is hit I cannot exceed 2% of my account balance. And if my stop IS hit, then price has pushed beyond support/resistance plus the buffer, which is the point where I would normally exit manually. Allowing the stop to trail will lock-in breakeven and accrued profits as the trade progresses...let's profits run!