Found 1 биржа where 4 is traded for BNB. According to the data on 4 October the most optimal price to exchange 4 for BNB is BNB0 for 1 4. This rate is fixed at Pancakeswap Infinity CLMM (BSC) at the maximum trading volume of the pair 4/BNB - 5 BNB.
The maximum daily trading volume is observed in the 4/WBNB trading pair at PancakeSwap (v2) (2) and reaches BNB 147,618.48 (52,818.86% of the exchange's total trading volumes) at the price BNB 0 per 1 4.