Margin is when a broker gives you more purchasing power than you have in your account. The terms "margin" and "exposure" are often used interchangeably. If a broker is providing "2x exposure", that is the same as saying that the broker is providing "50% margin".
For example,
Assume that you have ₹10,000 in your trading account, and your broker is providing you 50% margin (2x exposure) on Equity Intraday. That means that if you wanted to place a trade worth ₹10,000, and the Exchange requires the full ₹10,000 from the broker, only 50% of the trade value (i.e.₹ 5,000) would be debited on the transaction. By the end of the trading day, however, you must exit your Intraday position.
Many brokers require a "minimum" or "initial" margin; this is nothing more than the minimum amount you must maintain in the trading account.
For example,
A broker might require ₹10,000 in the initial margin; this means that you must have at least ₹ 10,000 in your trading account at all times.
A broker can provide different levels of exposure to different segments of products.
** Index and stock futures
Index and stock option sell
NSE Currency Futures
MCX Futures
Watch the below video to understand more about Margins with Upstox.