To achieve a 20 cents per pip value (with a $10 risk and 50 pip stop loss), a trader would need to use 2,000 units of currency, as 1,000 units (a micro lot) are worth 10 cents per pip.
"so if each pip needs to be worth 20 cents we already discussed this one micro lot is equal to 10 cents per pip and how much is a micro lot 1 000 units of currency so at this point we would need 2 000 units in order to place this trade"