Although you planned that you will sell your stocks when you can make profit 30%, but if the market is on its rising path, you should sell only some stocks according to the previous plan. The remaining stocks should be kept to be sold when the price is higher so that you will not miss the chance to make a big lump sum of profit. On the other hand, when the market is on its downward path, even though you planned to buy some stocks after it nodded its head up for over 5 price channels. But if the market still going down you might need to stay still, keep your cash and wait to see the situation because there is a highly chance that the stock will decrease suddenly after you have bought.