Import data from 'exchanges' that never held coin in wallet?

I have used exchanges such as Coinswitch, Changelly, ShapeShift (old non member version).
No coins were ever held in a Coinswitch, Changelly, ShapeShift wallet.
Is it necessary to import Coinswitch, Changelly, ShapeShift transaction histories (hard to find) if both the send and receive wallets are already imported?
Is there a danger of creating duplicates?

Hi @BDJ,

If the entries already imported, that’s fine. What you’ll want to do, is make sure to edit the transactions to make the trades appear as trades and not separate send and receive. The way to do this is similar to the manual editing for ICOs.