The Miner Position Index (MPI) is an indicator that reflects miners' selling behavior. It measures how much more BTC miners are selling compared to their usual activity. A high MPI indicates increased miner selling → bearish sentiment (often signaling a potential price top). A low MPI indicates reduced selling → bullish sentiment (lighter supply pressure). In particular, a sharp rise in MPI during an uptrend may signal an upcoming correction driven by miners taking profits. In short, MPI serves as a metric to gauge exit timing based on whether miner selling is increasing.