I think multiple doubles mean double risk, and not double gain. If you exaggerate your position, you increase risk taking, which can cause you to lose a lot. With a normal position size (2.5% of the capital) you can manage your account but if you exaggerate your position and get fake alerts from your system you may not have enough money to open positions when you will get a mark- correct sign. and I often do a lot of double that is very special, but only if you have special things, ordinary trading compilations, I still use many of the standards that I use. it does not matter to much, as long as we know the right time to do it