Borrow tags from other message type + change type vs cutomize tag?

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Imported from previous forum

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Now I need support BID and ASK price in Trade Capture Report, as informational fields, my upstream system might give BID/ASK in fraction, eg ”0 5/32”.

I found 132 BidPx/133 OfferPx are good candidate and can be borrowed from other message type(Quote), only problem is both are Price type only allow float format.

Now I have 2 option

  1. Customize dictionary, add 132 BidPx/133 OfferPx in TCR message, and change their type from Price to String
  2. Add 2 customized tags
    I think String covers float format so option 1 sounds slightly better to me,

Anyone has any comment what recommend best practice would be, or any better idea?

Many thanks.