An important tip i foun'd from the book " Profitting in bull and bear markets" is that one can use shorter moving averages that last on a weeks instead of months like in individual stocks. So I used 10 day MA and found that it is appropriate for the future indexes and even for VXX which is future reversal index.
So my buying point at 25 was during a declining market and hence had to wait now for the market to fall again. I prospects of market moving down are high and hence waiting on the position is fine.
I observed RSI indicator. It is important tool too for buying or selling short etc.