how to make strategy testing?

 

hi im from greece and im begginer to forex i was trading some years in stocks but from the day that i discover the metatrader everything change now all my time pass with this so to become ready to trancation from stock to forex i have thousands of questions but yours forum every day i solve some off them.Now i hade a probel like newbie with stradegy tester in mt4,when i take an EA and put him for strategy testing nothing happen it run for seconds and after nothing can you tell me step by step how to make strategy testing to EA?what means the 3 different models?

p.s sorry for my english