Any advice on moving to the next level or what I need to look at in order to reach my goals
An accruement of small profit margins is better compared to losing cash. In all honesty, you should continue what you are doing since you do not lose cash in the process. If there were such a process wherein one receives a high-profit margin with relatively low risk, then everyone could be rich by now.
It is also noteworthy that you realized the pattern on your profits. Again, just continue what you are doing and always diversify your investments whether for short/long-term.
If your current trading pattern is working and you are able to double your profits in days as you have said then you should continue with that, after all it better you stick to what you know rather then jumping into a new system that is capable of taking you off your feet for some time. All you need to do is to increase tour trading capital in your current trading pattern and you can double your gains from there.
As long as he does not lose cash in the process, he should just continue what he's doing now. Small increments of profit is better than losing money. As long as he continues to earn then he should probably start building his empire by now.