I absolutely agree with the views of the author. This is true even with my case. One thing I want to stress on is "Set a target for yourself" and sell it when the target is reached. Once a scrip shows the signs of reaching the target, start observing it closely. When it is about to reach place the order for your target. If the scrip does not reach the target then, wait for about 2 days and sell it when you are making a profit around your target. This is because blocking your funds for too long is also not good.
