please Help me for wrong return form NormalizeDouble( ) function

[mehdi khoshbakhtvash]

I want check all currency Bid price

NormalizeDouble( MarketInfo(TradePairs[i]+suffix,MODE_BID),MarketInfo(TradePairs[i]+suffix,MODE_DIGITS))

But this code return Wrong bid price For example return result for NZDUSD  0.7273500000000001

[honest_knave]

mehdi khoshbakhtvash:

I want check all currency Bid price

NormalizeDouble( MarketInfo(TradePairs[i]+suffix,MODE_BID),MarketInfo(TradePairs[i]+suffix,MODE_DIGITS))

But this code return Wrong bid price For example return result for NZDUSD  0.7273500000000001

You don't need to use NormalizeDouble() if you're using MODE_BID, unless you're doing something strange with the value.

That is the correct result for NormalizeDouble(). It is because of how floating point numbers are stored in binary. 

Example:

double MyVal=0.1;
printf("%.17f",MyVal);

Result: 0.10000000000000001

Just control the output when you want to display the number e.g. DoubleToString()

[fxsaber]

https://www.mql5.com/en/code/16169

[mehdi khoshbakhtvash]

honest_knave:

You don't need to use NormalizeDouble() if you're using MODE_BID, unless you're doing something strange with the value.

That is the correct result for NormalizeDouble(). It is because of how floating point numbers are stored in binary. 

Example:

double MyVal=0.1;
printf("%.17f",MyVal);

Result: 0.10000000000000001

Just control the output when you want to display the number e.g. DoubleToString()

Thanks a lot my firend

[William Roeder]

mehdi khoshbakhtvash: I want check all currency Bid price NormalizeDouble( MarketInfo(TradePairs[i]+suffix,MODE_BID),MarketInfo(TradePairs[i]+suffix,MODE_DIGITS)) But this code return Wrong bid price For example return result for NZDUSD  0.7273500000000001

NormalizeDouble returns a double - infinite digits - wrong use. Also your not understanding floating point - see price != price Do NOT use NormalizeDouble, EVER. For ANY Reason. It's a kludge, don't use it. It's use is always wrong 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 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 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 forum or Bid/Ask: (No Need) to use NormalizeDouble in OrderSend - MQL4 forum Lot size must also be adjusted to a multiple of LotStep. If that is not a power of 1/10 then NormalizeDouble is wrong. Do it right. Printf/PrintFormat or DoubleToString

[fxsaber]

For example

if ((CP(Lots, LotStep) >= MinLot) && ((CP(Price1, TickSize) == Price2))) // compare with the precision up to the second decimal place
  OrderSend...;

[mehdi khoshbakhtvash]

fxsaber:
For example

if ((CP(Lots, LotStep) >= MinLot) && ((CP(Price1, TickSize) == Price2))) // compare with the precision up to the second decimal place
  OrderSend...;

thank you