Hello,
In a zero spread account, brokers charge a commission. For example, in one broker I use, for 1 standard lot, they charge $7 as commission for EURUSD.
If I place a Buy/Sell trade with $1 lot on EURUSD, for a profit of 3 pips, it will be $30 - $7 = $23, and for a loss of 3 pips, it will...