Lot size limit

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Hello traders, 

I have recently been funded by a prop firm but unfortunately they have a lot limit requirement for the first 3 months and to give me peace of mind I was curious if there was a lot limit setting or tool within the MT5 terminal. I would be very grateful if someone could provide with the information.   

 
Control your risk, not your lotsize.

  1. 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 You place the stop where it needs to be — where the reason for the trade is no longer valid.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.

  2. Search for a GUI/Trade Assistant EA like mine (for MT4): 4): 'Money Manager Graphic Tool' indicator by 'takycard' - Risk Management - Articles, Library comments - MQL5 programming forum - Page 6 #55 (2018) and modified for screen resolution #75 (2020.02.17)

 
William Roeder #:
Control your risk, not your lotsize.

  1. 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.

  2. Search for a GUI/Trade Assistant EA like mine (for MT4): 4): 'Money Manager Graphic Tool' indicator by 'takycard' - Risk Management - Articles, Library comments - MQL5 programming forum - Page 6 #55 (2018) and modified for screen resolution #75 (2020.02.17)

Hello William, 

Firstly thank you for your reply. I control my risk very well and don't take anymore than 1% per trade but in the past I placed a trade and the server lagged and open the position twice which took my over the lot limit and the prop firm took away my funded account along with profits. I was curious if there was a setting or app to stop this from happening?   

 
The server did not lag and “open the position twice.” You got impatient and clicked open twice, instead of right-click → refresh and waiting for new ticks to arrive.
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