Feature Request: control vline width so no gaps/overlap between candles

Hello @DanielGoldfarb,

Is your feature request related to a problem? Please describe.
I like the vlines but they sometimes overlap when linewidths >= 8 or create gaps when linewidths < 8. It's noticeable when the number of bars are plotted.

Describe the solution you'd like

• Either another argument to passed into vlines so that there are no gaps or overlaps created.
• Or maybe something similar to vlines that is more specific for this purpose as this feature is slightly different than the original purpose of vlines.

Describe alternatives you've considered
I have not checked if it works in External Axes Mode.

Additional context
I made a semi-dynamic Panels Chart Class Example Notebook for my Pandas TA Library. The plot method is located at the bottom of Input Cell 11.

You can play around with the Chart class arguments, namely last argument, in Input Cell 12 to see what I mean.

Here are some example chart outputs:

Gaps

last = 30 and no linewidth argument used.

last = 90 and no linewidth argument used.

last = recent (recent = 251) and no linewidth argument used.

last = 2 * recent (recent = 502) and no linewidth argument used.

last = 30, linewidths=8

Overlap

last = 90, linewidths=8

last = recent, linewidths=8

Hope this helps!

Thanks for your time,
Kevin

Comienza con examples/example.ipynb, especialmente con el método plot en Input Cell 11 y los argumentos del gráfico en Input Cell 12. Reproduce las brechas y superposiciones indicadas con diferentes valores finales y linewidths, y determina después un comportamiento claro y probado para el espaciado de las velas en ambos modos de representación relevantes.