Using leverage in Futures Market

[Naografix]

Hello

How leverage works in the futures Market when I want to open a trade order?

Currently, I'm configuring the ticker with this:

await binance.futuresLeverage( 'ETHUSDT', 50 );
await binance.futuresMarginType( 'ETHUSDT', 'ISOLATED' );

And then, with 100$, I calculate the amount I can buy :

let amount = 100/PriceOfETHUSDT 

And opening the trade like this:

let buyOrder = await binance.futuresMarketBuy(pair, amount.toFixed(precision), {newOrderRespType: 'RESULT'});

But, do I need to multiply this amount by my leverage? Or Binance works lonely and my leverage is applied on my trade ?

Thank you

[Kuzmich100kM]

qty = orderSize / price * leverage

[Jaquedeveloper]

@Naografix How did you manage to do it?