Don’t use those Bitcoin/USDT (Tether) charts for trading
Tether loses its dollar peg in times of high volatility. This clearly impacts charting.
This is the BTC/USD pair on Bitstamp for the last 5 days. Notice the completed A-B-C correction.
This is the BTC/USDT (Tether) pair on Poloniex for the same time period. There’s no completed A-B-C correction because Tether lost its peg (ie it was worth more than a dollar because of extreme market demand) during the first selloff.