Based on the past BTC charts, the two horizontal pink lines are shaping up to be a solid long term support 3600 to 4500. Both lines will be tested multiple times IMHO in the next 3-6 months. Sell above and buy below. Short term, we should test the upper limit first.
If we are able to keep to this range, I would say with 80% certainty that the bottom is in at 3300 (can be retested but it is close to there)