How you can buy?
Wait and watch for the price to come close to the previous low or 786 and buy after watching price action.
If price do not stop at the previous low then let it come close to the 886 or at the lower channel line then look for price action and buy.
What kind of Price Action?
You can see the example in the video for price action.
How you can buy on current Price?
Watch for the flag on lower time frame which i have shown on lower time frame and look for buy after price action.
In case price do not continue then let it come close to the bottom and add more for longer term buy.