Yes, it is possible on average, some months less and some months more as I have done it and i'm currently doing it. The likely hood of keeping it going long term is higher if you trade manually rather than automated. Robots can't think so when market changes performance go down the drain. But with manual trading it is more than possible. Key is learn to trade yourself, understand how and why the market moves, discipline yourself, be patient, be persistent, have good money management, good trade management that's the key to success. No short cuts, no way around it.
The best offense is a good defense