EA and back testing for Spot index, metals and commodities

louisc85 2018.06.29 00:20

Hi guys,

I am not advanced coder in mql4 but I am learning the basic.

Here I would like to an help about how i have adapt the code that I tested on currencies for index, metals and commodities .

My broker has 5 digits so I fixed SL and TP at xxx points.

examples for German 30 I have this price :12792.78 and spread example 1.10

and I got this error Germany30,M5 and US30: OrderSend error 131

Can someone help to me?

I think is due to different using of digits than currencies.

Thank you

William Roeder 2018.06.30 12:44 #1

131

ERR_INVALID_TRADE_VOLUME

Invalid trade volume

Do you really expect an answer? We can't see your broken code. There are no mind readers here and our crystal balls are cracked.
Do NOT use NormalizeDouble, EVER. For ANY Reason. It's a kludge, don't use it. It's use is usually wrong, as it is in this case.
- Print out your values to the precision you want with DoubleToString - Conversion Functions - MQL4 Reference.
- SL/TP (stops) need to be normalized to tick size (not Point.) (On 5Digit Broker Stops are only allowed to be placed on full pip values. How to find out in mql? - MQL4 and MetaTrader 4 - MQL4 programming forum) and abide by the limits Requirements and Limitations in Making Trades - Appendixes - MQL4 Tutorial and that requires understanding floating point equality Can price != price ? - MQL4 and MetaTrader 4 - MQL4 programming forum
- Open price for pending orders need to be adjusted. On Currencies, Point == TickSize, so you will get the same answer, but it won't work on Metals. So do it right: Trailing Bar Entry EA - MQL4 and MetaTrader 4 - MQL4 programming forum or Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 and MetaTrader 4 - MQL4 programming forum
- Lot size must also be adjusted to a multiple of LotStep and check against min and max. If that is not a power of 1/10 then NormalizeDouble is wrong. Do it right.