BTC - A couple of strong support levels

After the BTC price fell to 26K, we had a trading range for a month, and last week the price broke out of the demand zone and decreased to 18K.
We must know that this is a second leg; if the price goes deeper, it could be reduced as much as the first leg. So the target could be 16.5K.
Additionally, a strong trend line and static support zone in a weekly chart could help support the price at the 17K level.