For mytrades.php
After this
PHP Code:
$tid = $_POST["tid"];
$petoffered = $_POST["petoffered"];
$tradewith = $_POST["tradewith"];
$petrequested = $_POST["petrequested"];
$moneyoffered = $_POST["moneyoffered"];
$trademessage = $_POST["trademessage"];
Add
PHP Code:
$moneyoffered = abs($moneyoffered);