Hi Siva,
Those shares for which "Wait for confirmation" is mentioned are trading in a narrow zone and have just given Buy signal. Such signals may be whipsaws which will reverse in a day-or-two. To avoid such situation it is better to confirm that the share is really making an up move by observing its next day's price movement which should be above the previous trading zone. It may cost us a bit more in terms of buying price but gives more safety in case of failed trigger. As my system does not check for any confirmation from other indicators, I wait and see the price movement if there is a doubt about the break out.
Similar is the case with Sell signals. A Sell signal may be triggered when a stock is consolidating after a good up move but after a couple of days it will resume its uptrend. In such cases we do not want to sell it without confirming the signal. This also will result in lower profit but assures a greater safety. It is always a trade-off between maximum profit and safety. If you choose one, be prepared to lose the other.
Regards
-Anant