Dont' forget the 2% rule. always calculate the correct lot size.
In this case, from 1.3190 to 1.3280 , risk distance is 90 pips.
if your account is 10k usd, 2% is 200 USD.
therefore the correct lot size is: 200 / ( 90 * 10) = 0.22 lot.
by doing this, you will set a pre-determined risk which you are comfortable with.