How much is the influence of Future price on price of equity? And how futures are practically traded?

How much is the influence of Future price on price of equity? and how futures are practically traded?

This is because during purchase or sale of future we enter no. of shares in lot .i.e 700 for one contract and 1400 for two contract and not the number of contracts. So while actually trading we are trading the equities only but in lots through contracts.

Considering this I’m asking the very first question mentioned above.

regards.

you can check the varsity chapter futures trading for more details about it