Metric name: LTH-NUPL (Net Unrealized Profit/Loss)

Chart:

API: https://chainmetrics.com/api/m34_lth_nupl?apikey=[YOUR-API-KEY-HERE]

Metric description: Long Term Holder NUPL (LTH-NUPL) is Net Unrealized Profit/Loss that takes into account only UTXOs with a lifespan of at least 155 days and serves as an indicator to assess the behaviour of long term investors.