Today's candle is just a retracement candle and should not be mistaken as trend reversal.
Tomorrow most likely there would be a gap up touching or crossing up the support line. However, i would be more interested in where the close is.
If the close is below 17500-17520 then next target would be 17200.
If the close is above 17500 then price is most likely to touch 17650-1700 before reversing down.
On the overall i am still bearish on Nifty.