You can apply conditional formatting by defining thresholds to account dimension members and measures either in a story or a model. For example, in your model you could define a threshold for revenue at $1,000,000, so that all stories based on the model can use the pre-defined revenue threshold of $1,000,000. When defining thresholds in a model, the definition is done only once. But thresholds at the story level must be defined in every story.
Define Thresholds in a Story
To define thresholds in a story, choose Conditional Formatting from the ...More option in the Tools area of the ribbon. From there, simply define your criteria for the formatting colors. Once the conditional formatting is defined, you can apply it to charts or tables on your story pages.
Apply to a Chart
You can apply conditional formatting to either a measure in a chart or to the Color definition for a chart in the Builder pane.
Apply to a Table
You can apply conditional formatting to a measure in a table in the Builder pane. You can also define a new threshold, just as you would from the main toolbar.