You are correct, the range was not being generated. A simple fix of adding quotes, resolved the issue. Here is code that fixed my issue:
<query>index=* sourcetype=Vectra-CEF signature="hsc" * | dedup src | search threat>0 AND certainty>0 | eval status= case(threat>=50 AND certainty>=50, "Critical", threat>=50 AND certainty<50, "High", threat<50 AND certainty>=50, "Medium", true(), "Low") | table status, certainty, threat</query>
<option name="charting.fieldColors">{"Critical":0xbe1e2d,"High":0xf05a28,"Medium":0xfaaf40,"Low":0x4e6875}</option>
Thanks for all of your help. Greatly appreciated.
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