Why I built it
A broker CFD ticker and its underlying share have different identities. Repeating those pairs in every indicator makes a small change unnecessarily repetitive. Mapper gives compatible indicators a shared place to find the counterpart.
How it solves the problem
Add Map once to the chart, configure the pair and connect both receiver inputs. It sends the symbol identity through two hidden plots. After setup, Map looks up the current chart symbol automatically, and the receiving tool requests the data it needs. Mapper itself draws nothing and fetches no price or volume.
TRADENATION:NVDA.EX = NASDAQ:NVDA
IG:AAPL = NASDAQ:AAPLCustom pairs take priority over the built in Trade Nation map. On an eligible broker chart, the lookup goes from CFD to native symbol. On a native chart, it returns the first matching CFD counterpart.
When do I need it?
Use Mapper when Info, Real Volume or Levels receives its two code inputs. Keep it on that chart after the initial connection. You do not need it when Info or Levels has a suitable local mapping, or Real Volume has an explicit formula. Those settings take priority.
Supported symbols and mapping limits
The source recognises IG, Trade Nation and Trade Nation SB prefixes. This is not a promise that every instrument has a built in pair. Unresolved mappings send zero and receivers remain empty where appropriate.
The transport accepts uppercase letters, digits, -, :, ., and _, up to 18 encoded characters, with compact Trade Nation prefixes. It does not transport !. Use the receiver’s direct mapping or volume formula for continuous futures such as CME_MINI:NQ1!.
Credits
Original work by SVKO. Mozilla Public License 2.0, as recorded in the indicator documentation.