Market Stratergy

Why is there a need for averaging in market? This is most unwantedstratergy followed by people all over the word. According to me ,averaging fails in the market in the long run ,keeping someprobability for the unpredictable nature of the Marketindexes . Ifcertain share or commodities fall to a great extent then there is noreason to buy that at a lower price as I have already pointed out flowwith market otherwise market will punish for going against the trend.