Let me offer you several observations:
1. I assumed the returns were cum returns, and that each division was one week's data. Overall if you can consistently get a 12.5% monthly return, that is outstanding results that very few of us can obtain consistently. Even though it is just a demo account, it is very very good. My suggestion is you should run the demo for a few more months to see if the results still hold, if so you may have a workable system.
2. I want to offer a word of caution too. Most of your gains were from 3 out of the 12 periods. The other periods you did not make any profits or incurred small losses. You need to dig down and find out if those gains were due to trading skill, chance or just riding an up market. If your system is robust, I would expect the gains to be more evenly spaced, independent of market condition?
3. Realizing that >95% of traders failed, you need to know when to hold and when to fold.
Best wishes.
