I think the use case is signalling between exchanges for millisecond advantages in arbitrage trades, not for trading on a single exchange. See https://spectrum

I think the use case is signalling between exchanges for millisecond advantages in arbitrage trades, not for trading on a single exchange. See https://spectrum.ieee.org/wall-street-tries-shortwave-radio-to-make-highfrequency-trades-across-the-atlantic https://spectrum.ieee.org/wall-street-tries-shortwave-radio-...