Let assume we have two winning systems which both of them made the same total amount of profits at the end and executed approximately the same number of trades. The first system has 80% winning rate while the second has only 40% winning rate. Which system you prefer?
The first system is not good because lots of small gains but one big lost got killed. While the second has small number of gains and many small loses but one big gain cover almost all loses. The person who choose the first system tends to enjoy taking profit early but will hold loses longer, this is death. And the person who choose the second system has the psychological preparation that loses is part of the game, meaning that he doesn't have much difficulty cutting loses early.
The first system is not good because lots of small gains but one big lost got killed. While the second has small number of gains and many small loses but one big gain cover almost all loses. The person who choose the first system tends to enjoy taking profit early but will hold loses longer, this is death. And the person who choose the second system has the psychological preparation that loses is part of the game, meaning that he doesn't have much difficulty cutting loses early.