I need a fresh set of eyes on this trigger. Can some one take am moment  and perhaps point me in the right direction?

Trigger:

trigger Opportunity on Opportunity (before insert, before update) {
	System.debug('Alerting on Opportunity Trigger --------------------> Starting ');
	for(Opportunity o:trigger.new){

		Boolean boolStage;
		Boolean booRec;
		Boolean boolClose;

			if(trigger.isUpdate){
				Opportunity oldOpp = Trigger.oldMap.get(o.id);
				if(oldOpp.StageName != o.StageName){
					boolStage = true;
				}
				if(oldOpp.CloseDate != o.CloseDate){
					boolClose = true;
				}
			}
			
//			for(integer i=0;i<rec.size();i++){
				if(boolStage == true ){
			//StageName = 1-Qualification Complete/Research, 0-Prospecting	
				if(o.StageName == '0-Prospecting' || o.StageName == '1-Qualification Complete/Research'){
					o.Forecast_Identifier__c = 'Lead';
			//StageName = 2-Assessment, 3-Justification, 4-Internal Estimate
				}else if(o.StageName == '2-Assessment' || o.stageName == '3-Justification' || o.StageName == '4-Internal Estimate'){
					o.Forecast_Identifier__c = 'Open';
			//StageName = 5-Final Proposal
				}else if(o.StageName == '5-Final Proposal'){
					o.Forecast_Identifier__c = 'Upside';
			//StageName = 6-Vendor Selection, 7-Contract
				}else if(o.StageName == '6-Vendor Selection' || o.StageName == '7-Contract'){
					o.Forecast_Identifier__c = 'Committed';
			//StageName = 8-Closed
				}else if(o.StageName == '8-Closed'){
					o.Forecast_Identifier__c = 'Won';
		 		 }
				}else if(!trigger.isUpdate){
			//StageName = 1-Qualification Complete/Research, 0-Prospecting	
				if(o.StageName == '0-Prospecting' || o.StageName == '1-Qualification Complete/Research'){
					o.Forecast_Identifier__c = 'Lead';
			//StageName = 2-Assessment, 3-Justification, 4-Internal Estimate
				}else if(o.StageName == '2-Assessment' || o.stageName == '3-Justification' || o.StageName == '4-Internal Estimate'){
					o.Forecast_Identifier__c = 'Open';
			//StageName = 5-Final Proposal
				}else if(o.StageName == '5-Final Proposal'){
					o.Forecast_Identifier__c = 'Upside';
			//StageName = 6-Vendor Selection, 7-Contract
				}else if(o.StageName == '6-Vendor Selection' || o.StageName == '7-Contract'){
					o.Forecast_Identifier__c = 'Committed';
			//StageName = 8-Closed
				}else if(o.StageName == '8-Closed'){
					o.Forecast_Identifier__c = 'Won';
		 		 }
				}
				
				if(boolClose == true){
					o.Target_Complete_Date__c = o.closeDate+90;
					o.General_Availability_Date__c = o.closeDate+90;
				}
//			}
		

		} 

	}

 TestCase:

@isTest(seeAlldata=true)
private class TestOpportunityTrigger {

    static testMethod void myUnitTest() {
    	System.debug('Alerting on TestOpportunityTrigger --------------------> Starting');
    List<RecordType> rec = [Select id, name from RecordType where sobjecttype = 'Opportunity' and name = 'Business Development'];    

	Account acc = new Account();
	acc.Name = 'Test';
	acc.ShippingStreet = '123 Est Street';
	acc.ShippingCity = 'Home';
	acc.ShippingState = 'AL';
	acc.ShippingPostalCode = '36105';
	insert acc;
	System.debug('Alerting on --------------------> acc Details'+acc);
	
	List<String> stName = new List<String>{'0-Prospecting','1-Qualification Complete/Research','2-Assessment','3-Justifiction','4-Internal Estimate','5-Final Proposal','6-Vendor Selection','8-Closed'};
	for(integer p=0;p<200;p++){
		for(Integer i=0;i<stName.size();i++){
		Opportunity opp = new Opportunity();
		opp.RecordTypeId = rec[0].id;
		opp.StageName = stName[i];
		opp.AccountId = acc.id; 
		opp.Name = 'TestOpp';
		opp.Type = 'Availity Connect';
		opp.CloseDate = date.today();
		opp.Opportunity_States__c = 'AL';
		opp.Description = 'Testing';
		System.debug('Alerting on --------------------> opp Details'+opp);
		try{
			insert opp;
		}catch (Dmlexception e){
			System.debug('Insert Failed '+e);
		}

			opp.StageName = '0-Prospecting';
			opp.CloseDate = opp.CloseDate+4;
			try{
			update opp;	
			}catch (DmlException e) {
				System.debug('Update Failed '+e);
			}

		}
	}
	
	
    }
}