Line Graph With the Average of TOP 3 and/or Bottom 3 N Comparing Against The Selected Choice

[muhitdinfa]

I am trying to create a line graph where I want to see 3 lines in the graph in the same visual:
1st line - the average price of Top 3 Brokers

2nd line - the average price of Bottom 3 Brokers

3rd line - my selected Broker's price

	12:00pm	13:00pm	14:00pm
Broker A	12.55	15.32	14.78
Broker B	13.82	14.22	13.05
Broker C	21.73	13.32	12.98
Broker D	18.83	19.25	15.50
Broker E	19.55	16.77	12.91
Broker F	14.65	12.85	13.01
Broker G	11.24	15.02	13.04
Broker H	12.95	14.97	11.78
Top 3 AVG	20.0366	17.1133	14.4433
Bottom 3 AVG	12.2467	13.4633	12.5567

One of the biggest challneges is that I want to exclude the selected Broker out of top/bottom 3. For example, if I want to compare Broker D against the average of top/bottom 3, Broker D shouldn't be included in the calculation of top/bottom 3. I am not sure if it's possible in PowerBi, but would be great to have that option in there. 

[muhitdinfa]

This is the outcome I would like to see