Why does the trend indicator differ from the KPI values on the Analyze KPI page?

The variance is likely due to a small difference between the KPI values that's ignored while calculating the trend on the Analyze KPI page for KPIs that are based on non-currency measures.

The KPI values on the Analyze KPI page are based on the currency definition for currency-based measures and user preferences for non-currency-based measures. However, the trend indicator is determined by taking into account only two places of decimal values for non-currency-based measures.