trigger OpportunityTracking on Opportunity (after update) {
    for (Opportunity opp : Trigger.new) {
        if (opp.StageName == 'Closed Won' && 
            Trigger.oldMap.get(opp.Id).StageName != 'Closed Won') {
            Performance_Tracker__c tracker = new Performance_Tracker__c(
                Sales_Rep__c = opp.OwnerId,
                Opportunity_Amount__c = opp.Amount,
                Close_Date__c = opp.CloseDate
            );
            insert tracker;
        }
    }
}
 

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