Object tree
The Object tree is a feature that allows managing (hiding, showing, or removing) drawings, indicators, and symbols on the chart.
The Object tree is enabled by default but you can hide it by disabling the show_object_tree
featureset.
Users can access the Object tree through the left toolbar (in Advanced Charts) or the right toolbar (in Trading Platform).

Fix undefined values
The undefined
string appears in the Object tree when the exchange
and listed_exchange
properties are missing from the LibrarySymbolInfo
object.
You should provide this object via the resolveSymbol
callback.
To resolve this issue, ensure these properties have appropriate values in the LibrarySymbolInfo
object.
Alternatively, you can hide the symbol exchange display by enabling the hide_object_tree_and_price_scale_exchange_label
featureset.