A Type of Stock Chart

Hello all,
This may be straightforward but I'm missing something!

I have a test where I take a count. I use that number to lookup an expected upper and lower range applicable for that number and that day. Then later I do a second count and I expect, in most cases, that the second count will also be within the limits that I found from the lookup of the first count. Sometimes count 1 will be higher than count 2 and vice versa but the same limits will be applied based on count 1. Also there may be times when count 2 is outside the upper or lower limit from the lookup but that's OK.

I've found an example of what I was trying to get (attached) and thought it was a version of a stock chart but that keeps advising me that the results need to be in a specific order to graph and with my process I can't guarantee a set order every time that so it doesn't seem to be working for me. (Obviously the data in the attached doesn't match with the example chart that I found but the principle that I want to apply is the same)

Thanks shg.
No wonder I was having problems, I never would have looked at this type of chart as a line type. It makes sense now that the stock type wouldn't work for me. I used your reply and everything is looking good.
Thanks