Watching for Jul Calls

As June calls get closer to expiring I have started watching Jul calls. I like buy stocks and sell covered calls ATM or ITM for 4+ percent return after commissions. Stocks I am currently tracking to determine if they will be in a buy position on 23 Jun are: MON, X, VLO, AUY, LDK, TRA, AA, TIE, POT, GRA. Will keep an eye on these and watch for others. I like the stock to be turning up from a recent down trend to improve the chances of being exercised.