- New EA - "Predator"
- Help With My EA
- Order Modify and Order Send Error
Please consider which section is most appropriate — https://www.mql5.com/en/forum/172166/page6#comment_49114893
Search before you post ... https://www.mql5.com/en/search#!keyword=error%20134
134
Not enough money
Also read the following ...
The checks a trading robot must pass before publication in the Market
MetaQuotes, 2016.08.01 09:30
Before any product is published in the Market, it must undergo compulsory preliminary checks in order to ensure a uniform quality standard. This article considers the most frequent errors made by developers in their technical indicators and trading robots. An also shows how to self-test a product before sending it to the Market.

- docs.mql4.com
Control your risk and you will not reach your margin limit.
Risk depends on your initial stop loss, lot size, and the value of the symbol. It does not depend on margin or leverage. No SL means you have infinite risk (on leveraged symbols). Never risk more than a small percentage of your trading funds, certainly less than 2% per trade, 6% account total.
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You place the stop where it needs to be — where the reason for the trade is no longer valid.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. Then you compute your lot size.
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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.)
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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) -
You must normalize lots properly and check against min and max.
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You must also check Free Margin to avoid stop out
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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.

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