On 20.06.2018, GRUH FINANCE closed(302.5) UNTOUCHED below Lower Bollinger Band (10,1) which indicates it is oversold. Close above that candle (309.8) would be a great buying opportunity with a STOP LOSS at 297 (low on that candle). CMP on 22.06.2018 is 310.15.
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Bought at 310. CMP is 304, keep SL at 297 on closing basis.