Harvey balls indicators

I would like to use “harvey balls” indicators, could you give more information about this with some examples?
I would like to compare the sales of two months and put a green triangle when the current month is better and the previous one. Red triangle when previous month is better than current month.
Thank you in advance,

I love Harvey Balls, they have always been a favorite visualization of mine. These indications are available as part of the State Indicator controls in Dundas BI. Look inside the state proprieties under style and you’ll find them. ‘Ellipse’ is default but all the Harvey options are in there too.