Hi all,

I made search but could not find any answer... is it possible to transform any custom indicator to calculate its values from specific date or bar?

Thanks

Jamal

Hi Roy,

{ Date inputs }

Copyright © 2003-2008 Jose Silva
http://www.metastocktools.com }

StDay:=Input("start Day",1,31,1);
StMnth:=Input("start Month",1,12,1);
StYear:=Input("start Year",1800,2200,2005);

Result:=rsi(14);
Start:=Year()>StYear
OR (Year()=StYear AND (Month()>StMnth
OR Month()=StMnth AND DayOfMonth()>=StDay));
aa:=ValueWhen(1, Cum(Start)>0, Result);

Thanks for replying, if I understand right way , it should be like this, in this example rsi indicator begin whenever date you choose and does not matter how many bar you loaded to your chart ...however is not be true that when I expected the indicator should begin from 0 whenever date I choose..

Jamal.

Hi Roy,

Sorry my poor english, I just expected the indicator should begin from 0 value when I choose a specific date.... because it starts to calculate its value whenever date I choose.. So when I select date 01..01.2007 then indicator should begin from zero value on that time am I wrong with that? ..

Jamal

Hi Roy,

Thank you for detail explanation :)

Jamal

Hi Kym Limiting an indicator to plot just the last N periods (or frames) is not too difficult. First you need a down-counter for frames or bars. Let’s go with bars for the moment. DC:=LastValue(Cum(1))-Cum(1); This will have a value of zero on the last bar, so if you want a value of one for the last bar change DC to… DC:=1+LastValue(Cum(1))-Cum(1); To vary the display via the indicator's Parameters window then you need an Input() function to enter the required number of periods. N:=Input("Periods to plot",5,9999,100); DC:=1+LastValue(Cum(1))-Cum(1); DC; The last line of code uses a ValueWhen() function to inhibit the target indicator’s output until the down-counter is equal to or less than your N-bars setting. For this exercise I’m just using the down-counter as the indicator display but this should work with virtually any indicator not already using 6 Input() functions. {Limit Plot to N Bars} N:=Input("Periods to plot",5,9999,100); DC:=1+LastValue(Cum(1))-Cum(1); { } {place your indicator in this space} { } ValueWhen(1,N>=DC, DC {output signal name} ); If you want to count weeks or some other frame size you’d need to modify the DC down-counter variable to count weeks (or frames) instead of bars. Here’s hoping I’ve answered the right question. If you want to “blank” the last N bars the trick is to calculate the number of bars you want to get rid of and then do a “Right / Left shuffle” with the signal to be partially blanked. This is just a matter of nesting one Ref() function inside another such that the inner Ref() function moves your expression to the right by N bars and then the outer Ref() function moves the truncated expression N periods to the Left. The shuffled expression ends up back where it started but missing the last N bars. Roy

Hi Kym The extra DC was intentional so that the formula plotted 100 bars of the down-counter without any other code being added. This allows anyone to copy the code directly into the Indicator Builder and get a result even before adapting it to suit their own needs. Roy

Hi Roy, One last little issue I wanted to sort out. I’ve been trying to modify your code to produce a similar indicator that will only plot from a specific date and for N bars previous to that date. I’m obviously not a very good coder, but I think my code below does what I want except that it is also plotting something (it’s not the result?) from the specific date to the end of the chart. For some reason my code isn’t restricting the plot from the specific date to the right hand side of the chart. Much appreciated if you could eyeball the code see what I’m doing wrong. Thanks. {Limit Plot from specific date to N Previous Bars} EnDay:=Input("end Day",1,31,31); EnMnth:=Input("end Month",1,12,3); EnYear:=Input("end Year",1800,2200,2006); N:=Input("Periods to plot",5,9999,100); {Selected end date} end:=Year()<enyear OR (Year()=EnYear AND (Month()<EnMnth OR Month()=EnMnth AND DayOfMonth()<=EnDay)); {Periods from end date to end of chart} perenddate:=LastValue(Cum(end)); {Periods from end date - N periods to end of chart} startrangedate:=LastValue(Cum(end))-N; result:=C; ValueWhen(1,Cum(1)<perenddate AND Cum(1)>=startrangedate,result);