In the MoonBot spot terminal for the Binance exchange, in the upper left corner of the chart, I see F-$ and F-B icons on some coins, but not on others. What do they mean?

: Interface configuration

In the MoonBot terminal, only spot charts from the Binance exchange in the upper left corner show marks on some coins:
F-$ (Futures-Usdt, you will most often see this mark)
F-B (Futures-Busd, you will see this mark less often e.g. on a LUNA coin), which indicate that this same coin is also traded on the Binance futures market in USDT and BUSD pairs.
Why is this important for us to know?
Generally, coins that are also traded on futures markets have larger volumes and are more predictable, because they are harder to manipulate on futures markets, and on the spot market, the price is equalized by exchange arbitrage trading bots and skew movements occur less often than on coins that are not traded on futures.
Also, in some strategies, traders whitelist and trade only coins that are on both the spot and futures markets.

Please note! In MoonBot terminals connected to other exchanges: HTX, Bybit, Gate, Bitget, the F-$ and F-B symbols are not available on spot charts.