It's the average amount of bitcoin deposited into all exchanges. Our users usually utilize this indicator with a 24-hour moving average(or 144 blocks - 10 minutes for block interval). In the 144-block moving average chart, if this indicator goes over 2 BTC during the surge, Bitcoin whale dumping is likely to happen. If it goes below 2 BTC immediately after the dip, it means victim whales are depositing to exchanges but not sold them.