If you have a hard stop limit order (stop-loss) then volatility is already accounted for.
Personally speaking, from my experience any measurement of volatility is a lagging indicator, and markets undergoing extreme volatility swings are no place for real-time observations to then react and do something about a trade. I've seen too many guys freeze up, and I've seen too many markets dry up.
For me and my clients, we can have on several positions simultaneously, and so I insist upon stop loss stop limit orders being placed GTC at the time of trade entry. For the varied backgrounds and temperaments of my clients - this has proven the best approach.
As a side note, I teach my clients to set both profit targets and stop-loss levels based upon modeled trading range. If the entry skews the risk /reward for that modeled range, we take a pass on that particular entry. Since we model thousands of Spread combinations in virtually every electronic market, I want my clients to be selective with their trade entries. We get excellent results with that approach.