GER40 Lot Size Calculator

GER40 is an index — this calculator uses its own real contract size and point value rather than a one-size-fits-all forex formula, since point value and typical price steps vary a lot between instrument types.

How do I calculate lot size for GER40?

Say a trader has a $10,000 account and decides to risk 1% of it on a GER40 short (sell) at 25,330.55, with a stop 152 points away at 25,482.55.

Rounded to a size a broker will actually accept, that's 0.06 lots — a $102.49 loss if the stop is hit.

Using the same 152-point stop, here's how that scales at two common risk levels on a $10,000 account:

• Conservative (1% risk): $100.00 at risk, 0.06 lots
• Balanced (2% risk): $200.00 at risk, 0.12 lots

These are illustrative figures at a fixed example balance and stop — the calculator above uses live prices and your own real inputs. The percentage-risk model itself follows the position-sizing approach popularized by Van Tharp in Trade Your Way to Financial Freedom, among the most widely cited references for treating position sizing as its own risk-management discipline.

What is a standard, mini, and micro lot on GER40?

At GER40's stored contract size (10 units per lot), a "mini" position (0.1 lots) and "micro" position (0.01 lots) scale the point value down by the same factor — $1.12 and $0.11 per point respectively. Useful for sizing a position precisely rather than rounding to a full lot.

When should I adjust my lot size for GER40?

Consider sizing down around high-impact news events or major session overlaps, when volatility and slippage risk increase — a stop that normally holds can be jumped past entirely in a fast move. That risk is higher for an index like this one, which can gap on economic data releases than for a typically calmer major forex pair.

Conclusion

This math only holds if 10 units per lot and $11.24 per point are actually your own broker's real numbers for GER40 — every broker can quote contract specifications slightly differently. Always confirm your own platform's GER40 specification (right-click the symbol in Market Watch, then Specification) before trusting a suggested lot size for a real trade. See how lot size is calculated step-by-step for the general method, Wikipedia's entry on contracts for difference for how brokers structure these contracts, and real MT4 order-ticket screenshots at different leverage settings for further reading.

Contract specification

Frequently asked questions