The margin required for executing intraday trades in futures and options is lower when compared to positional trades. To trade in equity the margin requirement for intraday is 20 to 40%, whereas, for CNC trades, it's 100%.
Futures trading is an agreement to purchase or sell a particular quantity of a commodity or asset at a predetermined price at a future date. It is quite risky and so it is important for the investors to know about futures in detail, so that they do not end up losing money and time.