Banknifty has reached its support of 21050 which also the daily Bollingers lower band.one can expect the RBIs dovish policy along with surge prices of SBI and ICICI bank should push the BN higher.In addition , there is a hidden BULLISH divergence in RSI and BN prices. Immediate target would be 21500 by Thursday expiry and 23000 by month-end if global factors support.