Add extra detail on notional in Trading FAQ#18

Feedback from a participant on trying to place orders on the ETH/VUSD market:

notional value = spot price * contract size * number of contracts [I think]
so on the other markets I have used, the contract size must be a fraction of $
e.g. if price is $200
contract size = 1/200
then notional = $200

so I actually wanted to buy 1 contract, not 200
I think it’d be handy if the trading questions page had a worked example of calculating notional value / margin allocation / leverage”

anyway appreciate all of the help!

Can we make this clearer in the trading FAQ as he requests if we don’t already?