Automatic number of contracts calculator

For me it's the most important tool we need. We know Future trading needs to be with a number of contracts. So, to be easier for us, it will be perfect to have a calculator about number of contracts.

With a link about the order tool, enter the entry value, the SL and the TP.

The calculator will be so nice to calculate the number of contracts we need if we choose per example to risk $100 or $200 or anything else.

I know tradingview use it already so let's do it also please.

Thank you so much!