how to initialize a default value

[daniel1211]

The first time the user loads a file, the graph does not display the high

 and low targets.   On subsequent loads, the targets show up. I am trying to work out some bugs on this program but i am have some difficulties with this problem. i was told to initialize a default value before i start how would i do that. i have attacthed the program and one of the files we were using . i apologize for the mess of code, this is what i am trying to fix

[RavensFan]

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