Currency Conversion based on condition in BW

Question

Hello,
I have gone through the cople weblogs/links/doc whatever information I found on currency conversion. However I am not able to figure out what could be done in below scenario. Please guide.
Scenario -->
I have STATUS and POSTING_DATE in my Cube. Key Figure in this cube is AMOUNT. Transactions are created in source system in local currency. When data is extracted to BW, I get AMOUNT in local currency and with right clicking on this column in Bex, I can convert it in Fix Target currency or I can permanently create one new column in my report which will always shows fixed target currency for AMOUNT. So far so good.
Now the problem is I wanted to use the conversison rate maintained in TCURR table based on some condition.
Ex: IF STATUS=CLOSED, then use Conversion rate as of POSTING_DATE,
        ELSE, use current date exchange rate.
Standard currency conversion always use curent date for calculating exchange rate, but can I use conversion rate as of POSTING_DATE?
Please advice.
Regards
Pankaj

Answer 1

Thanks everyone for reply. I really apprecite your help.
I tried the suggested FM "CONVERT_TO_LOCAL_CURRENCY", just have one more clarification.
I debuged this FM and saw that Date which we are passing get's inverted as this is how date is maintained in TCURR table. So far so good. But TCURR table normally get's loaded once a month (say at the start/end of month) and so we will have only one date there. However input date which I am passing into thi FM can be any date (as this is the date maintained at transaction level). How do you handle this case?
Please advice.