$fname = str_replace('%s', strval($sub), $fname);
$fname = str_replace('%t', $timeframe, $fname);
$fname = str_replace('%f', $fmt_ext, $fname);
$fname = str_replace('%s', strval($sub), $fname);
$fname = str_replace('%t', $timeframe, $fname);
$fname = str_replace('%f', $fmt_ext, $fname);