Binary Options Signals Indicator. The BO Indicator is an Meta Trader 4 signal indicator that will advise you when trading opportunities arise. The Binary Options signals indicator can be used to trade on any binary options broker. Operates on the MT4 Platform. Trades on the 5m, 15m, 1Hr, 1Day Expiry Times. Works Across all Major Currency Pairs, commodities, indices. Once a trading opportunity is generated, an arrow, pop-up box and sound alert will be generated so that you can take the trading opportunity. The arrow will include the direction of the trade (CALL/PUT) while your exit position should be timed based on the time-frame you are trading.