BTCUSD to retest 4200 after fork

I'm expecting Bitcoin to retest $4200 after the fork.
Typical retracement from the two previous ATH has been at around fib level 0.618. Assuming this run is overheated due to the fork, the drop could be proportional.
Looking at the chart, it would also be supported by the medium term uptrend line.
Trend Analysis

כתב ויתור