Short Term downtrend looks prominent on the charts. On 13.06.2018 NIFTY managed to close UNTOUCHED above Upper Bollinger Band (10,1) which indicates it is overbought. Close below that candle (low on Heikin - Ashi), 10,793, would be great shorting opportunity with a STOP LOSS at 10,900 (high on Heikin - Ashi on that candle)