Agree, but, mind bender... this relationship also applies to currencies. A useful statistic is the volume transactions required to shift the price 2%, looking a

Agree, but, mind bender... this relationship also applies to currencies. A useful statistic is the volume transactions required to shift the price 2%, looking at an open order book. It gives you a notion of the available liquidity. It is liquidity that matters, as it allows influx and efflux without causing inelastic price movements.