Someone give me a formula

[cassb]

I know, I know... NT support staff you can ignore this because you're not supposed to help with common C# programming.

So if anyone ELSE could help me, I would sure appreciate it.

I need a formula to tell me how many decimal places are in a number. Given the variable TickSize, how can I tell the number of decimal places are in that variable? I've tried a lot of things... logarithms, dividing, you name it. I cannot figure this out, and it's got to be simple. For now, this is what I'm doing, but it's crazy messy, and it's an amateur way of programming for this highly professional programmer.

int decimals = 0;
if (TickSize == .1) decimals = 1;
if (TickSize == .25) decimals = 2;
if (TickSize == .01) decimals = 2;
if (TickSize == .025) decimals = 3;
if (TickSize == .001) decimals = 3;
if (TickSize == .0025) decimals = 4;
if (TickSize == .0001) decimals = 4;


Thanks!
Bryan

[eDanny]

Why would you need to know this? Try : double sizeofticks = 1 * ticksize;
I don't have platform open to test but I think that would store .25 in the variable sizeofticks for the ES and .1 for the TF, etc. It would show the correct ticksize for the instrument in the chart that your indicator is on.

[RJay]

I know, I know... NT support staff you can ignore this because you're not supposed to help with common C# programming.

So if anyone ELSE could help me, I would sure appreciate it.

I need a formula to tell me how many decimal places are in a number. Given the variable TickSize, how can I tell the number of decimal places are in that variable? I've tried a lot of things... logarithms, dividing, you name it. I cannot figure this out, and it's got to be simple. For now, this is what I'm doing, but it's crazy messy, and it's an amateur way of programming for this highly professional programmer.

int decimals = 0;
if (TickSize == .1) decimals = 1;
if (TickSize == .25) decimals = 2;
if (TickSize == .01) decimals = 2;
if (TickSize == .025) decimals = 3;
if (TickSize == .001) decimals = 3;
if (TickSize == .0025) decimals = 4;
if (TickSize == .0001) decimals = 4;


Thanks!
Bryan

Hi CassB,

I'm not sure what your planning on doing, but here's thought.

Instead of having different length decimals, make them all the same.

If you can redefine all your decmials to 4 digits.

Ex.

.1 = .1000
.25 = .2500
.0001 = .0001

Would this help.

I don't know if this is possible, just a thought.

Good Luck,

RJay

[cassb]

Well, maybe what I'm trying to do would help. I am using this 'decimals' variable in the Math.Round function.

So, you would have a statement like:

x = Math.Round((Open[0] - (y * z)),decimals);

... where y and z are double. Since I want x to be rounded to the same number of decimals that the TickSize is, I need to know how many decimals are in TickSize for the instrument this program is running for.

See?

[PrTester]

Well, maybe what I'm trying to do would help. I am using this 'decimals' variable in the Math.Round function.

So, you would have a statement like:

x = Math.Round((Open[0] - (y * z)),decimals);

... where y and z are double. Since I want x to be rounded to the same number of decimals that the TickSize is, I need to know how many decimals are in TickSize for the instrument this program is running for.

See?

This is from Woodies Panel code maybe help. :-)

// Set the stringformat parameter for decimal places to suit the instrument.
// This ensures that trailing zeros are always displayed - maybe an easier way to do this?
int tickLength;
double temp1 = TickSize - (int)TickSize;// get fractional part of TickSize
if (temp1 < 0.001) // c# will use scientific notation for small numbers. Attempt to cope with this here.
{
decimals = (temp1*1000).ToString(); // make it into a string, after removing 3 leading zeros
tickLength = (decimals.Length)+3; // get the number of characters in the string(then add back the 3 previously removed)
}
else // no need to cope with scientific notation(hopefully)
{
decimals = temp1.ToString(); // make it into a string
tickLength = decimals.Length; // get the number of characters in the string
}
switch (tickLength) // set format depending on length of string
{
case 1: decimals = "f0"; // eg YM 1t = 1 point
break;
case 3: decimals = "f1"; // eg ER2 1t = 0.1 point
break;
case 4: decimals = "f2"; // eg NQ 1t = 0.25 point
break;
case 5: decimals = "f3"; // eg 1t = 0.001 point
break;
case 6: decimals = "f4"; // eg 6E 1t = 0.0001 point
break;
case 7: decimals = "f5"; // eg 1t = 0.00001 point
break;
case 8: decimals = "f6"; // eg 6J 1t = 0.000001 point
break;
default: decimals = ""; // default is no fixed decimal format
break;
// more options can be added if neccessary......
}
Print(Time[0].ToString() + " decimals= " + decimals);

[cassb]

This is from Woodies Panel code maybe help. :-)

// Set the stringformat parameter for decimal places to suit the instrument.
// This ensures that trailing zeros are always displayed - maybe an easier way to do this?
int tickLength;
double temp1 = TickSize - (int)TickSize;// get fractional part of TickSize
if (temp1 < 0.001) // c# will use scientific notation for small numbers. Attempt to cope with this here.
{
decimals = (temp1*1000).ToString(); // make it into a string, after removing 3 leading zeros
tickLength = (decimals.Length)+3; // get the number of characters in the string(then add back the 3 previously removed)
}
else // no need to cope with scientific notation(hopefully)
{
decimals = temp1.ToString(); // make it into a string
tickLength = decimals.Length; // get the number of characters in the string
}
switch (tickLength) // set format depending on length of string
{
case 1: decimals = "f0"; // eg YM 1t = 1 point
break;
case 3: decimals = "f1"; // eg ER2 1t = 0.1 point
break;
case 4: decimals = "f2"; // eg NQ 1t = 0.25 point
break;
case 5: decimals = "f3"; // eg 1t = 0.001 point
break;
case 6: decimals = "f4"; // eg 6E 1t = 0.0001 point
break;
case 7: decimals = "f5"; // eg 1t = 0.00001 point
break;
case 8: decimals = "f6"; // eg 6J 1t = 0.000001 point
break;
default: decimals = ""; // default is no fixed decimal format
break;
// more options can be added if neccessary......
}
Print(Time[0].ToString() + " decimals= " + decimals);

Aha... exactly! What a good idea to convert the TickSize to string and then count the characters. Why didn't I think of that? I was so hooked on a mathematical solution that I missed the obvious. Thank you!

Here is what I ended up using -- as I didn't find that C# was converting a ticksize of 0.0001 to scientific notation:

            double temp = TickSize - (int)TickSize;                // get fractional part of TickSize
            string a = temp.ToString();                         // make it into a string
            if (a.IndexOf(".") > 0) decimals = (a.Length - 2);    // get the number of characters in the string minus the leading 0 and the decimal point
            else decimals = 0;

Bryan

[Ralph]

Hi cassb,

had a similar problem some time ago. I tried to define a string format for numbers according to the ticksize. Here is what I did:

[FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]public [/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]string [/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2]PriceFormat([/SIZE][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]double[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New] TickSize)[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]{[/FONT][/SIZE]
[/SIZE][FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]  short[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] Precision = [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New];[/FONT][/SIZE]
[/SIZE][FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]  while[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] (TickSize % [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]1[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] > [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0.0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New])[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]  {[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]    TickSize *= [/FONT][/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][FONT=Courier New][SIZE=2][COLOR=#800080]10[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2][FONT=Courier New];[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]    Precision++;[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]  }[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]  return Precision == [/FONT][/SIZE][/SIZE][FONT=Courier New][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] ? [/SIZE][/SIZE][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000]"G"[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] : [/SIZE][/SIZE][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000]"F"[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New] + Precision;[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]}[/FONT][/SIZE]
[/SIZE]

Regards
Ralph

[cassb]

Hi cassb,

had a similar problem some time ago. I tried to define a string format for numbers according to the ticksize. Here is what I did:

[FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]public [/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]string [/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2]PriceFormat([/SIZE][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]double[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New] TickSize)[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]{[/FONT][/SIZE]
[/SIZE][FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]  short[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] Precision = [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New];[/FONT][/SIZE]
[/SIZE][FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]  while[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] (TickSize % [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]1[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] > [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0.0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New])[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]  {[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]    TickSize *= [/FONT][/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][FONT=Courier New][SIZE=2][COLOR=#800080]10[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2][FONT=Courier New];[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]    Precision++;[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]  }[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]  return Precision == [/FONT][/SIZE][/SIZE][FONT=Courier New][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] ? [/SIZE][/SIZE][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000]"G"[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] : [/SIZE][/SIZE][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000]"F"[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New] + Precision;[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]}[/FONT][/SIZE]
[/SIZE]

Regards
Ralph

Thanks Ralph! It looks like you're a better C coder than I am. I come from a COBOL, Fortran, Basic background, so I tend to use that kind of syntax even in C. I need to learn some of the cool features of C, I think.

[r2kTrader]

Ralph,

Very nice. Could you decode for the 1st graders?

Thanks

Hi cassb,

had a similar problem some time ago. I tried to define a string format for numbers according to the ticksize. Here is what I did:

[FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]public [/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]string [/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2]PriceFormat([/SIZE][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]double[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New] TickSize)[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]{[/FONT][/SIZE]
[/SIZE][FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff] short[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] Precision = [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New];[/FONT][/SIZE]
[/SIZE][FONT=Courier New][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff] while[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] (TickSize % [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]1[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] > [/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0.0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New])[/FONT][/SIZE]
[SIZE=2][FONT=Courier New] {[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]   TickSize *= [/FONT][/SIZE][/SIZE][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][FONT=Courier New][SIZE=2][COLOR=#800080]10[/COLOR][/SIZE][/FONT][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2][FONT=Courier New];[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]   Precision++;[/FONT][/SIZE]
[SIZE=2][FONT=Courier New] }[/FONT][/SIZE]
[SIZE=2][FONT=Courier New] return Precision == [/FONT][/SIZE][/SIZE][FONT=Courier New][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] ? [/SIZE][/SIZE][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000]"G"[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][SIZE=2] : [/SIZE][/SIZE][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000][SIZE=2][COLOR=#800000]"F"[/COLOR][/SIZE][/COLOR][/SIZE][/COLOR][/SIZE][/FONT][SIZE=2][SIZE=2][FONT=Courier New] + Precision;[/FONT][/SIZE]
[SIZE=2][FONT=Courier New]}[/FONT][/SIZE]
[/SIZE]

Regards
Ralph

[cassb]

Ralph,

Very nice. Could you decode for the 1st graders?

Thanks

By the way, this is still working for me... I added the "E" check for scientific notation. It works pretty well and it's more understandable to this Visual Basic programmer.

            double temp = TickSize - (int)TickSize;                // get fractional part of TickSize
            string a = temp.ToString();                         // make it into a string
            if (a.IndexOf(".") > 0) decimals = (a.Length - 2);    // get the number of characters in the string minus the leading 0 and the decimal point
            if (a.IndexOf("E") > 0) decimals = Convert.ToInt16(a.Substring(3));    // If scientific notation, then extract the number of decimal places, e.g. 1E-06

[Ralph]

The method returns a price-format-string usable to transform a double-value into a string according to the ticksize, i.e. ticksize: 0.25 -> value-string: 881.75 (and not 881.750000).
If the ticksize is > 0, then the returned format string is "G".
If the ticksize is 0.25, the returned format string is "F2".
If the ticksize is 0.0001, the returned format string is "F4".

Regards
Ralph

[Ralph]

There is that saying, at least here in Germany: Different roads lead to Rome. Great stuff, cassb.

[hegh2000]

thank you very much.

[cassb]

Glad we could help ... in an obtuse sort of way.

[Mindset]

Round

cassb

I am a relative newbie but wouldn't it be simpler to use

public Double RoundPrice ( double price) 
			
{return base.Bars.Instrument.MasterInstrument.Round2TickSize(price);}

then
x = Math.Round((Open[0] - (y * z)),decimals);(Post #4)

becomes

x = RoundPrice((Open[0] - (y * z)));

I think it does anyway.