Use the binance referral code '100eyes' to get 10% discount on all your futures trading fees. Or click the following binance referral link to be redirected to the futures page automatically: http://www.binance.com/en/futures/ref/100eyes.
Even if you already have a Binance account, you can STILL use the referral code to get discount on your fees, as Binance is seeing this as a separate part of your account! For more info see 'How do I open a Binance Futures account'
For the maximum 20% discount on your regular (spot) trading fees use the binance referral code LKCUG1AT which you can fill in the 'Referral ID (optional)' field. You can also just click on this link directly https://www.binance.com/en/register?ref=LKCUG1AT