This might work for you, but in my experience the no. 1 cause of account wipe-outs (almost by definition) are losses which are run too far. The average trader wants to be RIGHT more than he wants to make money, this is a human condition. This leads to cutting profits too soon and not cutting losses in time (can't admit to being wrong).
If you have the mental strength to use .. er .. mental stops, then that's fine, but I would suggest the majority of traders do not. They should enter a stop alongside the trade, and then only move that stop in the direction of the trade thereafter.
I saw many countless examples of losses being run too far at an institutional level and am aware of this problem in myself, despite 15yrs+ of trading. Read "The Big Short" by Michael Lewis (an excellent book), which details a trade one Morgan Stanley trader ran from 98 c to 7 c, costing his firm $4bio. He had multiple chances to take it off on the way down, but refused.
"Pros" are less likely to be susceptible to running losses too far, but it does happen. However, they tend to have a 3rd party safeguard in the form of risk managers, but it doesn't always work like it should.