We have recently added handlebars features to allow conditional content in the dynamic notes widget.
You can add an if else statement around text and do a text comparison using the gt, gte, lt, lte, eq comparator in the if condition.
You can either type the handlebars in the WiziWig editor
{{#if (gte Var 0) }} ↗ {{{Var}}}% {{else}} ↘ {{{Var}}}% {{/if}}
or switch it to html mode “</>” and type the handlebars such as this
<h5 style="text-align: center; ">
<span style="font-weight: bold;">
{{#if (gte Var 0) }} <span style="color: rgb(255, 0, 0);">↗ {{{Var}}}%</span>
{{else}} <span style="color: rgb(107, 165, 74);">↘ {{{Var}}}%</span>
{{/if}}
</span>
</h5>