As one can see during this phase of the bullrun (16 Dec - 20 Jan) BTC used the 2/1 line as effective support bouncing off the upward 1/1 line at its ATH, until breaching the 2/1 on the 20th, finding support on the downward 1/1 line. BTC has managed to get a leg up and find support on the upward 3/1 line, however it is looking weak and will now find further resistance on the downward 2/1 line. Given BTCs current weakness and current trajectory, I think it will continue to head down, reaching the volume support level at £17490 (approx $24000) between 26 Jan at its earliest and 14 Feb at its latest, although an absolute bottom could potentially be £14400 (approx $19700) as late as 24 Feb in a worst case scenario.