Description: {instance-name} - Traffic Out (bits/s)
Parameter : .1.3.6.1.2.1.31.1.1.1.10.{instance}
Origin: SNMP - Unsigned Integer 64bit
Transformation :  Average delta per second
Transformation script: $1 * 8
Instance Discovery : SNMP Walk - OIDs
Base SNMP OID: .1.3.6.1.2.1.31.1.1.1.1

It's work ok.
I need add event when percent bandwidth reach.
I create Threshold script below but the "{instance}" seem to fail.

$ifo = GetInterfaceObject($node, {instance});
$speed = $ifo->speed;
if ($1/$speed*100 > $2)
  return true;
else
  return false;

How can i get {instance} value? or get interface speed from variables $dci, $node, $object?