Or a simple method, I read somewhere
Buy call and put of same strike at 9.30 and square off your position at 3.25 or early (if in good profit) as the case may be
This is perhaps called strangle option strategy, if I am right
You are wrong. But never mind, as most who have little idea about option strategy trading get confused with all those names. In this case you talk about a "Long Straddle":