The book value formula is a useful tool in the Forex market to help determine the intrinsic value of a currency. It takes into account the amount of money that a currency would be worth if it were sold off to pay off all outstanding debts. The book value formula is used to measure the potential of a currency in terms of its stability and rate of return. It helps to determine the current worth of a currency based on the current market value and trading price. By relying on this information, investors can make informed trades and maximize their profits in the Forex market.