Is there any way to return a list of all tweets that contain the dollar sign character?
The only search capability of Twitter related to the dollar sign character is related to cashtags, which are like hashtags for stock tickers. For example, searching “$AAPL” will give you tweets related to the Apple stock. The “$AAPL” results are different from the results that you would get searching “AAPL” without the dollar sign.
However when you search “$100”, the dollar sign is parsed out and you receive the same list of tweets that are returned if you were to just search “100”. When you search “$” empty results are returned.