When any stock or index is moving in a channel, Harmonic pattern can be very useful in predicting possible breakouts.
If Nifty holds 8500 and starts moving upside then possibly we can have a D leg of a Bearishharmonic pattern in the making.
You can pick multiple X from the channel resistance.
There are other patterns too in the current Nifty chart.
This channel is full of structures. It all depends whether Nifty can hold 8500 tomorrow and show some reversal sign.
Nifty failed to hold 8500 and structures also failed. Nifty saved by the bell or previous support line will be watchful.