Add Up/Down Arrows To Shapes In Drawing Tools

Pretty self-explanatory.

Could you please add an Up Arrow & a Down Arrow to the drawing tools, perhaps under shapes?

It could even just be an option added to the current trendline that allows you to add an arrow to one end.

This is very useful for marking up charts, and I am currently trying to draw them with a combo of trendlines.

Thanks,

Donovan