Redo `gts` and `lts` objects

[coatless]

There are way too many copy and paste code overlaps between the two c.f. 49f56d12c7aba0c6f99ab7116c3645e7d98bcb90 and 99c8226090352c0023785ce69edf220d1ec69eed. This is not very efficient.

There also needs to be a better way to set what the output is (e.g. "Stock Price", "Swarm", ... )