Making an EA that controls lots size

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i have an EA that perfectly works, the only problem is that when market moves in one direction it will open Big Lots Size and that is risky. I want to control it. So that I want to make an EA that performs these functions:

1- We can set minimum and maximum lots size

2- We can set total buy lots and sell lots 

3- We can set total open order

4- When these conditions hits, it disable the "Auto trading" button in Mt4 window and all EA's stops working.

5- When all current trading close then it automatically enables the "Auto trading" button in Mt4 window and all EA's again start working.

Please anyone help me!

Thanks

 

  1. Help you with what? You haven't stated a problem, you stated a want. Show us your attempt (using the CODE button) and state the nature of your problem.
              No free help (2017)

    Or pay someone. Top of every page is the link Freelance.
              Hiring to write script - General - MQL5 programming forum (2018)

    We're not going to code it for you (although it could happen if you are lucky or the problem is interesting).
              No free help (2017)

  2. Control your risk. 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 You place the stop where it needs to be — where the reason for the trade is no longer valid.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

    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.

  3. Ignore the button, just stop trading.
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