Opinions please STTer'sOver the last few weeks I have managed to...

Opinions please STTer's
Over the last few weeks I have managed to accumulate a few STT's, namely;
MSB @1.74
PBH @8.00
RBL @4.06
TPW @8.14
I hold between 3 and 6k worth of each of these. Managed to get my average down by buying the dips and selling the highs on just a portion of each stock, and a generous amount of luck. Example MSB and PBH.
Acquired yesterday;
KGN @19.19 KAR @74.5
Just 2K in each of these at the moment. (I have limited trading capital).
So, if I buy more of each of these at around current prices I am raising my average price, is this worth doing? Example, I buy 425 MSB @4.70 (I wouldn't) for a cost of 2k, and already holding 1214 @1.74 it brings my average up to 2.49. Last week my average was 1.09 until I bought more at 4.74 and saw what a big difference it made to my average.
This would be the case on all the above stocks, so not sure if I would be doing the right thing?