Step 3: As mentioned in step 2, are trying to maximize the volume of a box. The volume of a box is V = L · W · H, where L, W, and H are the length, width, and height, respectively. Step 4: From Figure 4.64, we see that the height of the box is x inches, the length is 36 − 2 x inches, and the width is 24 − 2 x inches. Liquidity. Stock chart volume also shows us the amount of liquidity in a stock. Liquidity just simply refers to how easily it is to get in and out of a stock. If a stock is trading on low volume, then there aren't many traders involved in the stock and it would be more difficult to find a trader to buy from or sell to. Essentially, open interest is used as a predictor of eventual liquidity. Volume: Volume is the measure of traded contracts for a designated period. Essentially, every time a futures or option contract is bought or sold, volume increases by one. For instance, if the front month E-mini S&P 500 has a daily volume of 2 million, this means that 2.