Indicator for Entropy

strelow · Postby **strelow** » 27 Sep 2020

Hello

There are any indicator created in easylanguage for entropy ?

I found this site

https://rosettacode.org/wiki/Entropy

I have difficult to translante to easylanguage to create list of probability .

I know this is a thermodinamic formula but I saw some studies using this to measure stock volaty.

Thanks for help.

Svetlana MultiCharts · Postby **Svetlana MultiCharts** » 05 Oct 2020

Hello strelow,

There is no such pre-built indicator in MultiCharts. We found the following PowerLanguage code in the website mentioned by you.

Code: Select all

var: inp ("1223334444");
var: len_inp(StrLen(inp));
var: uniqe_char ("");
array:freq[10](0);
var: _i (0), num_uniqe_char (0), ch("");
for _i = 1 to len_inp begin
		ch = MidStr(inp , _i, 1);
		num_uniqe_char = InStr(uniqe_char, ch) ;
		if num_uniqe_char = 0 then 
			begin
				uniqe_char = uniqe_char + ch;
				freq[strlen(uniqe_char)] = 1;
			end
		else 
			freq[num_uniqe_char] = freq[num_uniqe_char] + 1;
end;
for _i =1 to strlen(uniqe_char) begin
	value1 = freq[_i] / len_inp;
	value2 = value2 + value1 * LogXY(2,value1);
end;
value2 = value2 * -1;
once begin
	cleardebug;
	print ("inp:",inp);
	ch = "";
	for _i =1 to strlen(uniqe_char) begin
		ch = ch + NumToStr(freq[_i],0);
	end;
	print ("len_inp:",len_inp);
	print ("freq:", ch);
	print ("uniqe_char:",uniqe_char);
	print ("entropy:", value2 :3:10 );
end;

Output:

Code: Select all

inp:1223334444
len_inp:  10.00
freq:1234
uniqe_char:1234
entropy:1.8464393447

Indicator for Entropy

Indicator for Entropy

Re: Indicator for Entropy