This is an indicator of the consensus of traders in the crypto market. It examines the number of short and long positions on several currencies (BTC, ETH, XRP, LTC, XMR, EOS and others) on each bar.
Sometimes traders are in consensus and they are right (enter long and the currencies rise, or enter the short and the currencies decrease) other times, although they are in consensus, it can happen that the market behaves exactly the opposite. Some signals are good, some are not (as with any other indicator, unfortunately).
Because it uses data about multiple currencies, it is a market breadth indicator - it does not refer to One currency, but to several important currencies in the crypto market, simultaneously (calculates based on information about several currencies). That's why it loads SLOWLY - it can take up to 60 seconds to appear.
If a multi-currency trader bar goes LONG (meaning they agree that it should be long), it displays a green upward-facing arrow, otherwise, if there is a consensus that it should be short, it displays a downward arrow.