# How to calculate 1lot value

In my EA I need to know how much money will I spend if I buy 1lot of current symbol.

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Pawel

pkoral:

In my EA I need to know how much money will I spend if I buy 1lot of current symbol.

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Pawel

"Spending" money is meaningless.

Are you talking about the margin?

You can also open 1 lot, using \$200 of margin and loosing \$1000.

pkoral:

In my EA I need to know how much money will I spend if I buy 1lot of current symbol.

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Pawel

100K from the base currency.

Fabio Cavalloni #:

"Spending" money is meaningless.

Are you talking about the margin?

You can also open 1 lot, using \$200 of margin and loosing \$1000.

You are right, question was not good enough.

In my demo account I have EUR as base currency and leverage 1:1000. I have balance 8515,53 euro.

Then I want to buy 1lot GER30. In my user interface I can see a message " You'll invest 27,96, which is 0.33% of your money" (ask/bid 13967/13973)

How is it calculated?

Risk depends on your initial stop loss, lot size, and the value of the symbol. It does not depend on margin and leverage. No SL means you have infinite risk. Never risk more than a small percentage of your trading funds, certainly less than 2% per trade, 6% total.

1. You place the stop where it needs to be — where the reason for the trade is no longer valid. E.g. trading a support bounce, the stop goes below the support.

2. AccountBalance * percent/100 = RISK = OrderLots * (|OrderOpenPrice - OrderStopLoss| * DeltaPerLot + CommissionPerLot) (Note OOP-OSL includes the spread, and DeltaPerLot is usually around \$10/PIP but it takes account of the exchange rates of the pair vs. your account currency.)

3. Do NOT use TickValue by itself - DeltaPerLot and verify that MODE_TICKVALUE is returning a value in your deposit currency, as promised by the documentation, or whether it is returning a value in the instrument's base currency.
MODE_TICKVALUE is not reliable on non-fx instruments with many brokers - MQL4 programming forum (2017)
Is there an universal solution for Tick value? - Currency Pairs - General - MQL5 programming forum (2018)
Lot value calculation off by a factor of 100 - MQL5 programming forum (2019)

4. You must normalize lots properly and check against min and max.

5. You must also check FreeMargin to avoid stop out

6. For MT5, see 'Money Fixed Risk' - MQL5 Code Base (2017)

Most pairs are worth about \$10 per PIP. A \$5 risk with a (very small) 5 PIP SL is \$5/\$10/5 or 0.1 Lots maximum.

Reason: