Bricks/boxes instead of lines about asciichart HOT 10 OPEN

@jjalonso hey) The idea to support candlestick charts and renko charts is great. If you can draw a sample of a black&white Renko chart below using the box-drawing characters and GitHub markdown – we can try to add the support for it. Colorizing the chart is not an issue, however, drawing a readable renko chart with bodies and tails can be tricky. I suggest that you post a sample (draw it by hand) below:

```

your chart drawn with box-characters here

```

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@jjalonso it could also look like this:

█   █
 █ █ █             ╷    
  █   █    ╷       │ 
       █   █       █
        █ █ █     █ █
         █   █   █│
              █ █ 
               █

We will try to find combinations of symbols to draw it, and will add it, hopefully, soon. If you find a better-looking set of characters for Renko charts, let me know.

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Maybe? (wicks are optionals in some renko charts, im happy to not having them atleast)

                  ┏━┓
               ┏━┓┗━┛
┏━┓         ┏━┓┗━┛
┗━┛┏━┓   ┏━┓┗━┛
   ┗━┛┏━┓┗━┛
      ┗━┛

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there is few geometrical chars too, but not sure if it can be used.

▩ ■

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            ⬛      ⬛
          ⬛  ⬛  ⬛
⬛      ⬛      ⬛
  ⬛  ⬛        
    ⬛

hard to make wicks here

Also found this family interesting
https://jrgraphix.net/r/Unicode/2300-23FF

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2 boxes with wick

 ⎸
██

3 boxes with wick

            ███
        ███  │  ███
 │  ███      │   │  ███
███

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My suggestion (using ▁▂▃▄▅▆▇█ chars)

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