A miner controls supply on the blockchain by mining blocks. If mining pools shut down their mining activities for some reason, the network cannot be maintained. As mining pools to make profits as much as they can, normally there is a timing gap between mining and monetization. By observing their behaviors via metrics such as miner outflows, traders can find unique signals to make profits. We define the mining pool in our metrics as all participants in the mining pool including individual miners. i.e. Antpool outflow does not necessarily mean the withdrawal of Antpool alone, but the withdrawal of all miners who have been mined through Antpool.