Yesterday's closing below the resistance level of 173.30 gave the price an opportunity for bearish move. As shown here, the price is trying to continue its bearish move by breaking the support level of 172.00 and closing below 4h. In that case, we may get another opportunity for more sell signals and it opens the way towards the level of 171.50, as the first target. Besides, the price should test the support level of 171.00 afterwards to continue its bearish move. But as long as the price stabilizes above the support level of 172.00, it cancels the first scenario.

Resistance and support levels: R3 (173.80), R2 (173.30), R1 (172.60), S1 (172.00), S2 (171.50), S3 (171.00).