Convert pip value into cash before a forex lot size is chosen

Convert pip value before the position is live

Pip value should be calculated before a live FX position is opened so positional risk can be measured and position size chosen. A pip is the smallest standard increment a currency pair can move, usually 0.0001 on four-decimal quotes and 0.01 on two-decimal quotes such as USD/JPY. Pip value is the account-currency cash amount gained or lost when price moves one pip at a given lot size and exchange rate.

The domestic currency is the account currency in which pip value, stop-loss cash risk, and position size must be expressed. Until that cash figure exists, a stop distance on the quote board is only a price increment, not a bounded loss.

The account currency's place in the pair

The arithmetic for pip value changes with the account currency's place in the pair: quote, base, or neither. The base currency is the first named currency in a pair, the unit being priced. The quote currency is the second named currency in a pair, the unit in which the base is priced.

A cross-pair is a pair in which the account currency is neither base nor quote, so pip value must be converted through another rate and moves more often.

Lot size and the pip increment

Lot size is the notional count of currency units in the position: 1,000 for a micro lot, 10,000 for a mini lot, and 100,000 for a standard lot. Standard lot conventions in the examples are 1,000, 10,000, and 100,000 currency units, and pip value scales with that unit count.

Most major pairs are quoted to four decimal places while USD/JPY-style pairs are quoted to two, so the pip increment in the formula is 0.0001 or 0.01.

Dollar-account examples

With USD as the account currency and EUR/USD at 1.3000, a 10,000-unit position has a pip value of about $1.00 when the domestic currency is the quote.

With USD as the account currency, a 10,000-unit USD/CHF position at 0.9179 has a pip value of about $1.09, and a 10,000-unit USD/JPY position at 87.00 has a pip value of about $1.15.

When the pair is a cross

On a GBP/JPY mini lot with a USD account, pip value in dollars moved from about $1.19 to $1.12 when GBP/JPY went from 134.44 to 143.83 and GBP/USD from 1.6147 to 1.6077. The same mini-lot count did not keep the cash value of one pip fixed once the conversion rates moved.

Stop-loss and risk-reward in cash units

A stop-loss is a pre-set exit distance whose cash cost equals pip value multiplied by the number of pips to that exit. Volatility position sizing chooses lot size from account equity, current pip value, and a rate-sensitive stop distance so cash exposure stays bounded as quotes change.

The risk-reward ratio is the planned relationship between stop-loss and profit-target distances after both are converted into the same account-currency units. Converting stop-loss and profit-target distances through pip value makes the account-currency size of a planned risk-reward decision visible before and during the trade.