Standard Lot

A standard lot is the largest of the conventional lot sizes used in forex trading, representing the trade of 100,000 units of the base currency in any currency pair. It serves as the primary benchmark from which smaller lot sizes are derived.

When trading one standard lot on most pairs, the value of a single pip is typically close to 10 units of the quote currency. Consequently, even a small market movement of just a few pips can result in substantial financial changes to a trader's account.

Standard lots are suitable for traders with relatively large capital, financial institutions, or investment funds, due to the higher margin requirements needed to open a position of this size compared to mini or micro lots.

Fractions of a standard lot can also be traded—such as half a lot or a quarter lot—to provide greater flexibility in position sizing tailored to a chosen risk management strategy, without the need to commit to a full standard lot.

A common mistake among traders with small capital is using a standard lot without factoring in the risk-to-equity ratio, which can rapidly deplete an account when the market moves against the position.