@ -532,7 +532,7 @@ class StatisticsController extends ThinkController {
if(empty($oldrand[$randdata[$i][$field]])){
$randdata[$i]['change'] = 0;
}else{
$randdata[$i]['change'] = $oldrand[$randdata[$i][$field]] - $rand;
$randdata[$i]['change'] = $rand - $oldrand[$randdata[$i][$field]];
}