Lot Size with 0.1

[Jack Buda]

Hi there all

I'm looking for a way i can use my lot Size with 0.1, I tried using the code below it works but I'm not satisfied with it. Below $100 it wont trade at all. I want my Lot size to trade in 0.1's.

When i change the "riskpercent" to 0.1 it's risky but will trade below $100, i don't want that.

double RiskPercent=0.05;

double LotStep=MarketInfo(Symbol(),MODE_LOTSTEP);

double LotSize=NormalizeDouble(AccountBalance()*RiskPercent*LotStep,1);

What i would like is as follows: Account $50-200 Lot Size 0.1, Account $300 Lot Size 0.2, Account $400 Lot Size 0.3. So on & so forth. I hope I'm making sense. Your help will be appreciated.

[Catalin Zachiu]

Jack Buda:

AccountBalance*RiskPercent/1000

If(AccountBalance<200 && AccBal>50)

Lot=0.1

[Jack Buda]

Catalin Zachiu:

Thank You Catalin I will give it a try

[Fabio Cavalloni]

I never understood people that calculates "RiskPercent" multiplying Balance for a factor, without considering SL points and Tick value.

This is not RiskPercent, is "calculate lots in a no sense way based on balance".

[Jack Buda]

Fabio Cavalloni:
I never understood people that calculates "RiskPercent" multiplying Balance for a factor, without considering SL points and Tick value.

This is not RiskPercent, is "calculate lots in a no sense way based on balance".

So what is it then, if its not "RiskPercent"?

[Catalin Zachiu]

Jack Buda:
So what is it then, if its not "RiskPercent"?

Fabio reffers to a more complex picture , I think , for example if there is floating loss , very near to stoploss and the EA tries to open another trade without the previous order being closed , using low balance or large lot size  , the EA will not be able to open a new trade , taking the Balance as referance point . I usually take AccountEquity in calculation istead of Balance .

[William Roeder]

Never risk more than a small percentage of your account, certainly less than 2% per trade, 6% total to the account. Risk depends on your initial stop loss, lot size, and the value of the pair. It does not depend on margin and leverage.

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 You place the stop where it needs to be — where the reason for the trade is no longer valid.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 2017.10.10
             Is there an universal solution for Tick value? - Currency Pairs - General - MQL5 programming forum 2018.02.11
             Lot value calculation off by a factor of 100 - MQL5 programming forum 2019.07.19
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.

[Fabio Cavalloni]

Catalin Zachiu:
Fabio reffers to a more complex picture , I think , for example if there is floating loss , very near to stoploss and the EA tries to open another trade without the previous order being closed , using low balance or large lot size  , the EA will not be able to open a new trade , taking the Balance as referance point . I usually take AccountEquity in calculation istead of Balance .

Absolutely not. 

Risk% need to be calculated based on lot size, stop loss and tick value.

Multipling balance for a number is nothing calculating risk, is calculating a number that has nothing to do with risk.

I can risk 1% opening 1 lot with $1000 if I set a SL of 1 pip.

And I can risk 100% opening 0.01 with 1000 pips of stop loss.

William's post explain it so well.

PS. Using equity instead of balance is not correct. If you have floating profit you will risk more, if you have floating loss you are risking less than the correct % of your balance.