I found the following info but need more clarification if it works and if I can find nse sources on this topic.

Moving averages are one of the oldest and most popular technical analysis tool. This section describes the basic of moving average and interpretation.
Nowadays you get moving averages readily available on most of the websites.
To brief you moving average is calculated by adding the closing prices of a stock for most recent 15 days and then dividing by 15 the result what you get is the 15 day moving average.

How to trade on moving average
Suppose If the stock price is above its 25 day moving average, it means that investor's current expectations (the current price of the stock) are higher than their average expectations over the last 25 days, and that investors are becoming increasingly bullish on this stock and result is that the stock price may go up.
Conversely, if today's price is below then its 25 day moving average, it shows that current expectations are below average expectations over the last 25 days and this may bring stock price lower.
The moving average is used to observe changes in prices. Investors typically buy when a stock price rises above its moving average and sell when the price falls below its moving average.

for nse, pls dont buy if price is abv d avg as it means
bus has already left...

Well, I read white mans stuff...its weird...its a matter of adding prices for 15 days divide by 15...there...u hav the answer for the following day price on specific counter....

thats the way it is. its a formula...you can try it...I hav started with mumias...

Alustaadh i agree with in as far as the moving average not being a replacement of other tools,but that is about it, first of all the longer the period of the moving average the less prone it is to giving false signals, a false signal basically means for example that if you get triggered into the market(buy) when price moves above the moving average then suddenly the price starts moving below the moving average(meaning you are losing). Moving averages are used in several ways ..you can use a crossover technique where you take a short period MA like 10 and a longer period MA say 55 and once they cross each other then you either buy or get out of your position. You can also use a basic "when price moves above or below technique"..the other use of the MA is also for reentry into the market ..for example if you bought KQ at 44 and it rallies to say 66 , when the price moves down to say 55 and touches your MA then you add to your position(buy more) in anticipation of another rally( after the pullback). But the moving average is by far not the only technique you need to succeed , you can add an oscillator like a stochastic or RSI which basically shows you if the market is tired (overbought) or bottomed (oversold), or use momentum indicators like Momentum and Average True Range, to show you the strength/weakness of the rally.
Using indicators alone might not be the best strategy though , from my experience , you need to understand the fundamentals both internal (company) and external(economy) to be able to make an informed decision whether to enter or exit the market. Hope this helps.