Each candlestick represents a specific period and is made of three (3) components: Investopedia / Julie Bang Similar to bar charts, candlestick charts comprise four price points: open, high, low, and ...

and a Nano in a nifty 3D printed box up top to do some math and display the number of cans remaining as a simple bar graph. The sensor reads one bay, and the code multiplies by two to get the total.