How to find the bottom of a trend

In this example I show the pattern of the end of a downtrend which has the following conditions:
1- long and strong downtrend.
2- A stretch in volume which is one sign for the end of the trend (sell panic). So, whales are ready to buy at low prices.
3- A falling wedge. This means there are lower lows but with weaker momentum, this means whales started to buy.
4- Buy after a reversal candle.