As you see, I have marked the second biggest peak volume by two green horisontal lines. The date of the chart is from the beginning of the latest bullrun(red vertical line) to the end of the bullrun . During this time between the price of 1900-2600 USD most seller and buyers were traded BTCUSD to either moving the price up or down. Meaning that the pointed area is a big support were we unfortunately heading next if price breaks under current support 3100USD.