MT4 ArrayBsearch function problem

I want to know the top 3 daily fluctuate currency pips every hour,and I made a little indicators,the only problem now is although I can get top 3 pips,but I don't know which pips belong to which currency,the ArrayBsearch function is not work as I expect,and I can't find out what's wrong with my code.

Can someone please help me,thank you very much!

Hi qq,

The problems are:

1. You can use ArrayBSearch to search IN the sorted array, which is pips2 in your code. But you search in pips, which is the UNSORTED array:


You can also find this info in the mql4 documentation

2. The array you sort must be sorted with ASCEND, not DESCEND. This is not included in the documentation (By the way, you didn't give any more parameters to ArrayBSearch, which assumes it searches from index 0, with ASCEND as direction. This corresponds with the ascending order of the sorted pips2[]. However, if we want to reverse this, ie. sort pips2[] with DESCEND, and add the extra parameters to ArrayBSearch like this: WHOLE_ARRAY,19,DESCEND, in theory it must work as well, but for some reason, it doesn't.)

So, putting this all together gives us the new code:

1. Pips2 has the sorted pip values, pips2[0] has the lowest value, pips2[19] has the highest.
2. You check all pips[] values for their position in pips2[]. But you need only the 3 highest, ie. indexes 17,18,19.
3. You correct the index number and print the info.

Greets,
Ralome

Dear Ralome,

Thanks for your detail and professional explain,the code works perfect now ,and this is why I like FF,I always get a quickly help here.

How do I miss that note? I guess is because I don't understand what's "Binary search" means.And Chinese version of this part is translate wrong,so didn't help at all.

Best regards!
qq