Series parameter syntax

[geme]

Hi,

Series Syntax (eg.)

cci( nLength [, Series | sym() | inv() ][, nBarIndex ] )

why not?

cci( nLength [, Series ] [, sym() ] [, inv() ][, nBarIndex ] )

Around these parameters to combine must always form a function:

// <--- snip
function main()
{
var sCCI20 = cci(20, efsInternal("hlc3", inv(5)));
}

function hlc3()
{
return ((high() + low() + close()) / 3); //calculate hlc3
}
// <--- snip

You should fire your system designers!

Regards,
geme

[eSignal_JasonK]

Hello geme,

The built-in study functions are overloaded functions, which allow for a number of combinations to be used without having to pass nulls for the unused parameter choices.

This allows you to use a combination of parameters that will always be 3 or less.



The second parameter that you are highlighting is a choice of one of the three options, Series, sym() or inv(). A Series can have an external symbol and/or interval embedded. The sym() parameter could also have in external interval embedded. The current design gives you the following possibilities.

1 cci( nLength , Series )
2 cci( nLength , sym() )
3 cci( nLength , inv() )
4 cci( nLength , Series , nBarIndex )
5 cci( nLength , sym() , nBarIndex )
6 cci( nLength , inv() , nBarIndex )

To use your suggestion, a null value would have to be passed for the unused parameters to specify any of the optional parameters that follow it, which would require the following syntax for the six possibilities above.

1 cci( nLength , Series )
2 cci( nLength , null , sym() )
3 cci( nLength , null , null , inv() )
4 cci( nLength , Series , null , null , nBarIndex )
5 cci( nLength , null , sym() , null , nBarIndex )
6 cci( nLength , null , null , inv() , nBarIndex )

Hope this helps.