Exchange rate should pick from TCURR based on custom date field added in MIGO

Hi,

In MIGO, FI document get posted by picking exchange rate based on the posting date. Through BADI(MB_DOCUMENT_BADI) we have added a field called translation date in MIGO screen, while doing GRN exchange rate should pick from TCURR based on translation date instead of posting date. We have tried this logic using substitution (GGB1) in FI accounting it is working fine in FB60 & F-02 transaction but it is not working with MIGO transaction. Please suggest some solution for this.

  
Thanks & Regards
Vinoth Kumar.M