if this is really a Wyckoff phase C spring then the next move will be a strong push to the resistances at 17505 and 18891 followed by movement to 21955.
On the other hand If this is not a phase C spring then id expect a rejection at one of the the resistance areas 17505 , 18891 or 21955 followed by BTC moving down to the 14700 area.
For now its best to watch the action and see if BTC is able to close at the minimum above the 18891 resistance.