NIFTY is trading in upward channel and is currenly testing the lower trendline on the channel. Zone between 21750, 100 EMA and the lower trendline of the channel should act as a strong support zone.
RSI is also showing a divergence right now.
If these supports break then price can pull down to next strong support zones marked by 200 EMA, Previous pink trendline as well as if we check the pattern target (all come around 21,000 level.
This is not a BUY/SELL recommendation but just an Educational idea to study the price movement in coming week.