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Lot size calculation

  • #21
  • May 18, 2008 10:00pm May 18, 2008 10:00pm
The above code works well for USD pairs, but does not seem to work for cross pairs.
2008.05.18 23:28:06 2006.11.01 04:00 BurstEA3 GBPJPY,H4: invalid lots amount for OrderSend function

Lottery = NormalizeDouble(AccountBalance()*(RiskPercent/100)/StopLoss/(MarketInfo(Symbol(), MODE_TICKVALUE)),2);
  • #22
  • May 19, 2008 4:04am May 19, 2008 4:04am
Thankyou

I have a lead from "First book" on Metaquotes forum, to use

MarketInfo() MODE_LOTSTEP to the code.


Your post leads me to believe I am on the correct track.


As I reasearch it seems I am not the only one to try and code this.


It would be nice to have it resolved for everyone.


Dale
  • #23
  • Sep 22, 2009 4:31am Sep 22, 2009 4:31am
Hello,

The original code rounds UP the number of lots, it is because NormalizeDouble rounds up, for example NormalizeDouble(0.0232, 2) results in 0.03 which is bigger than the wanted position size. Before applying NormalizeDouble it should be Floored.

Fixed code for bokers that allow micro lot granularity:

Inserted Code
Lots = AccountBalance()*Risk/StopLoss/(MarketInfo(Symbol(), MODE_TICKVALUE);
Lots = NormalizeDouble(MathFloor(Lots * 100) / 100, 2);
Trading = a mirror to your human flaws. Fix them or be fixed.
  • #24
  • Edited 9:28am Nov 4, 2010 8:19am | Edited 9:28am
Hello!

Please if somebody can check the code.

Now, tricky part is to calculate Lots from Price (Ask/Bid) and StopLoss, which is High (for Sell) or Low (for Buy) x BarsBack on chosen TimeFrame. Line 405 and 449.

Thank you for your help,

Have fun,

Simon

Attached EA is not intended for use on LIVE trading accounts. Use at your own risk.
The main Code is, I believe, from RR (thank you). If it is from anybody else, thank you.
Attached File(s)
File Type: mq4 SevenChi EA v1.1.mq4   22 KB | 483 downloads
  • #25
  • Nov 4, 2010 8:37am Nov 4, 2010 8:37am
Here's my function. Given an entry price, SL price and max risk in dollars (I suspect it'll work in any base currency) it spits out a lot size:

Inserted Code
double LotsBasedOnSL(double entry, double SL, double maxRiskDollars)
{
   double stopDist, stopPips, slDollars, lotSize;
   stopDist = MathAbs(entry - SL);
   stopPips = stopDist / Point;
   slDollars = stopPips * MarketInfo(Symbol(), MODE_TICKVALUE);
   lotSize = NormalizeDouble(maxRiskDollars / slDollars,2);
   //Print("stop pips: ",stopPips," dollars: ",slDollars," lots: ",lotSize);
   
   return (lotSize);
}
You are in a maze of twisty little passages, all alike.
  • #26
  • Nov 5, 2010 6:41am Nov 5, 2010 6:41am
Ola!

stevegee58, thank you for your answer. The code in my EA is quite similar. I have made it to work, although not quite correctly. It opens a little less lots as per LotCalculation spreadsheet. Well, better less than too much. Maybe the reason is because Alpari UK Demo account has tick_value for EUR USD = 7,031. As I know, it should be 10,000, for all USD pairs. He he, Alpari jokers! (All pairs that I have tested on this Demo account have lower tick_value(s) than other Alpari Demo account

And LotCalculation works irratic. Maybe I should add RefresRates() before OrderSend function?

Now I need to make it partialy close the position.

Guys, have fun,

Simon
Slovenia
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  • #27
  • Nov 5, 2010 7:03am Nov 5, 2010 7:03am
i really want to knw wht is d ppopriate lot size i can us for my 1000dollars trading portfolio
  • #28
  • Nov 26, 2010 7:53pm Nov 26, 2010 7:53pm
seun osho!

I guess that would be 0.01 lots maximum, if you have ex. Alpari Micro account.

Have fun,

Simon
  • #29
  • Nov 13, 2012 8:28am Nov 13, 2012 8:28am
Hello! Someone already tried to write code based on management of Ryan Jones? Traditional risk management is less when the capital of this small, but increasing the capital, also increases the risk, while the fixed proportion of management Ryan Jone lowers the risk as the capital.
Invest in creating their EAs, because one day you need one!
  • #30
  • Last Post: Oct 16, 2022 2:25am Oct 16, 2022 2:25am
[quote=smjones;2001053]here is how I handle it. The algorithm is Lots = AccountBalance or Equity * Percent To Risk / Stoploss in pips / Pipvalue /quote]
Even now, 13 years later, still people like me appreciate finding the code laid out so simple for me.
Thank you.
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