Wait for a voluminous breach of the purple triangle, and place shorts/longs in the same direction.
I provided a couple targets for both directions.
Small green arrows are 1.618 extensions of the big green arrows.
They nicely land into existing key support/resistance levels.
I prefer the upside as it would be a good point (in the context of the 2. auction) to break the long-term resistance diagonal (blue dashed line) and go into a new uptrend with new highs above 1k :]