Error in MC

[emptyvault 10]

I am really a little bit confused ...

I am still a Multichart novice and try to practice the easy language but the name in it is Power language . I cannot find the MRO function in the manual , both pdf and chm file which provided by the web site . The pdf manual was version 3.0 but the current version of MC is 5.0 gold ....

 

When I apply MRO in write my own indicator , it seems has error .

 

The other error I encounter was the program said I refer the data to future ....?? It has no problem when I run the power language complier .

 

It is sunday and I cannot ask the CS so I can only ask here , sorry .

[emptyvault 10]

I just looked again to MC homepage and found the the manual was updated to version 5.5 , woh !! what a surprise ....

 

but I still cannot find the MRO function . Is the manual not included all the function about power language ?

[Tams 20]

maybe you can start by refraining to use the title "Error in MC"

and use instead "Error in ME",

or "Confusion in ME".

 

;-)>

Edited August 30, 2009 by Tams

[Tams 20]

I am really a little bit confused ...

...

When I apply MRO in write my own indicator , it seems has error .

.

 

 

I am a little bit confused too...

what error did you encounter ???

do you expect people to read your mind?

can you copy and paste the error message? or take a screen shot?

 

 

 

Have you check the PLEditor to see if MRO is on the list?

 

if MRO is on the list, make sure it is compiled.

if it is compiled, there should be a green check mark beside the name under the Status column.

Edited August 30, 2009 by Tams

[Tams 20]

MRO (Function)

 

 

The MRO (Most Recent Occurrence) function returns the number of bars ago the specified expression was True.

Or, if the specified expression did not occur within the last x number of bars, the function informs you of such.

 

 

Syntax

 

MRO( Test, Length, Instance )

 

 

Returns (Integer)

 

A numeric value containing the number of bars ago that the specified Expression was True;

-1 if Expression was not found to be True within the last Length bars.

 

 

Parameters

 

 

Test: TrueFalse, Sets the true/false expression to check for (that is, Close > Open).

 

Length: Numeric, Sets the number of bars to check.

 

Instance : Numeric, Sets which occurrence,

for example, 1 = most recent, 2 = 2nd most recent, and so on.

 

 

Remarks

 

The MRO function is specifically designed to identify when a certain condition occurred.

It checks from the current bar and works away from it.

 

The function returns a number representing how many bars ago the true/false expression

was fulfilled (0 = current bar, 1 = one bar ago, 2 = 2 bars ago).

If the function does not find a bar within the specified Length,

which meets the criteria, it will return a -1.

 

Note When using the MRO function in an analysis technique, always check the result of the MRO function before using the value in another calculation or function. If the condition occurred over Length number of bars, a -1 value will be returned.

 

Example

 

Value1 = MRO( Close > Open, 5, 1 );

 

 

 

source: EasyLanguage manual

Edited August 30, 2009 by Tams

[Tams 20]

here's the code to MRO:

 

 

// Function: MRO

inputs: 
Test( truefalseseries ), 
Len( numericsimple ), 
Instance( numericsimple ) ;                           

MRO = RecentOcc( Test, Len, Instance, 1 ) ;

 

 

you will also need to check this function: RecentOcc

if you don't have it, you will need to add this before adding the MRO.

 

// function: RecentOcc 

inputs: 
Test( truefalseseries ), 
Len( numericsimple ), 
Instance( numericsimple ),                           
MLFlag( numericsimple ) ;                                                   

variables: 
var0( 0 ), 
var1( 0 ) ;

if MLFlag = 1 then 
var0 = 0 
else if MLFlag = -1 then 
var0 = Len - 1 ;

var1 = 0 ;

while var0 >= 0 and var0 < Len and var1 < Instance
begin
if Test[var0] then 
	var1 = var1 + 1 ;
var0 = var0 + MLFlag ;
end ;

condition1 = var1 = Instance and Instance > 0 ;
if condition1 then
RecentOcc = var0 - MLFlag + ExecOffset 
else
RecentOcc = -1 ;

 

 

HTH

[emptyvault 10]

thanks Tam , you are always kind and helpful !!

Forgive me about asking this kind of question as I really confused by this software sometimes .

 

I see the MRO in the function list of MC but no description in the latest version 5.5 manual .

 

In the Easylanguage manual , the MRO write :

MRO(Test, Length, Instance) ,

 

but for MC , it is :

MRO = RecentOcc( Test, Len, Instance, 1 ) ;

 

What is the 1 stand for ??

maybe that is what I am confused for ....

[Tams 20]

thanks Tam , you are always kind and helpful !!

Forgive me about asking this kind of question as I really confused by this software sometimes .

 

I see the MRO in the function list of MC but no description in the latest version 5.5 manual .

 

In the Easylanguage manual , the MRO write :

MRO(Test, Length, Instance) ,

 

but for MC , it is :

MRO = RecentOcc( Test, Len, Instance, 1 ) ;

 

What is the 1 stand for ??

maybe that is what I am confused for ....

 

 

 

it has no bearing on how you use MRO.

 

 

p.s. what was the error you referred to in post #1 ?

Edited August 30, 2009 by Tams

[Tams 20]

...

I see the MRO in the function list of MC but no description in the latest version 5.5 manual .

...

 

 

MRO is a function.

You should refer to the EasyLanguage® Functions & Reserved Words Reference

 

.

[emptyvault 10]

the error message is : Trying access at data to future Bars reference value : -1

 

It was a paintbar indicator that let me browse through the chart to look its performance visually .

 

Maybe it was caused by a variable , moving average [n] ,

I tried to refer to a value by a variable n in the bracket .

Is this syntax not legal in power language ?

 

When I test it in the complier , it is ok but when I add this indicator the error message pop out .

[Tams 20]

the error message is : Trying access at data to future Bars reference value : -1

 

It was a paintbar indicator that let me browse through the chart to look its performance visually .

 

Maybe it was caused by a variable , moving average [n] ,

I tried to refer to a value by a variable n in the bracket .

Is this syntax not legal in power language ?

 

When I test it in the complier , it is ok but when I add this indicator the error message pop out .

 

 

this error has nothing to do with MRO.

 

 

Trying access at data to future Bars reference value : -1

this will happen if you use a negative number in bar referencing:

 

e.g.

 

plot1[-1]

 

value1[-1]

[HAL9000 10]

Note When using the MRO function in an analysis technique, always check the result of the MRO function before using the value in another calculation or function. If the condition occurred over Length number of bars, a -1 value will be returned.

 

Hi, its just a guess,

but I think this check is missing

and therefore an array overflow might happen during run-time

(like Tams said within the previous post).

 

Regards,

 

Hal