Wisp ji on 23rd march we had a good breakout in OBV. So the BD that you talk about on 27th was just a retracement. If one had shorted intraday based on that should have covered. But i have been advocating to look for long opportunities in price when OBV breaks out. The time to look for shorting opportunities would be when OBV falls below the lows 28th. where it seems to have made the last base. One might argue that it fell but then as i have said, the real money would only be made with the big boys, so you might have to sacrifice a few points to the downside.