to take away =strtolower(SITE_CONFIG["site"]["currencyName"])?> just make it a negative number
maximum amount of =strtolower(SITE_CONFIG["site"]["currencyName"])?> you can give/take at a time is 500 =strtolower(SITE_CONFIG["site"]["currencyName"])?>
you cant give someones =strtolower(SITE_CONFIG["site"]["currencyName"])?> amount negative (why would you)