It's not me but if I were in your position, I would start closing out positions that you have at "break even" and concentrate on just one. Preferably one you can use the margin on else why have it?
If it was me, and it's not, but if it was, I would concentrate on the "odds and pay-off percentage". You MUST realize at this point, you are not investing, you are "educated gambling".
Examples of what I am talking about. Say you concentrate on a high dollar stock like APWR, how many shares can you buy with your total margin? If you double your 2240 cash with your margin, you can have 4480 less commissions to work with. Less the 1766 plus commissions for the shares you already have. That only leaves you 2714ish to work with. How many more shares of APWR can you buy with that? Ok, so let's say, just for the sake of arguements/discussions, you can get your total holding of APWR up to 300 shares. Now, if you made our 3% goal on 17.66 average, you get .5298 cents profit, times 300 shares works out to 158 bucks and change. See what I mean? You have risked WAY more than your pittance return has given back.
BUT, if you concentrate on a lower priced stock like FRPT or one of the others, you can buy more shares and therefore need less of a percentage price increase to start seeing better returns.
I hate putting all my eggs in one basket, I agree whole heartedly with the diversification concept, except you don't have enough funds available for diversification.
At 17.66 for a hundred shares of APWR, if you get a buck profit, you get a lousy hundred bucks less commissions.
See what I mean?
But I am not one to advise or I'd be writing books on how to get rich in the stock market. All of the above is my humble opinion.