useful indicator for Bet on Markets?

I'm trying out fixed-odds currency betting at BOM and am wondering if there's an indicator that can be successfully used to more or less predict the time when a certain price will be reached for, say, "One-touch" bets?

Any help will be highly appreciated.

Would a Gann indicator, for instance, enable me to "forecast" WHEN a currency pair's price will be at some future date (e.g., 7 days from now)?

Any ideas which MT4 indicator will suit my purpose for successful bets at BOM?

Thanks!