There are few zones or levels which can still work as a reversal point for another push towards 25k, 20900 and 19900.
If all other levels fail, 18900 should hold as we have seen previously.
BTC only broke below 18900 before because of the FXT chaos.
Also, if price falls to the 18900 level, momentum will be completely lost and we may see another sideway market.
Breaking below 18900 will open the door for another swing lower low.