[Bug] Error when charting multiple country indices

[jerryduluk]

Bug

Trying command: /economy/ $ index --indices sp500,ftse100,jp_n225,hk_hsi -s 2022-01-01 Only the sp500 is coming up. However, when individually requested, each index is able to load

Add “-r” and I get “Error: local variable “plot_data’ referenced before assignment

[JerBouma]

Also related to #4020