Threshold Bar Chart #

Introduction #

The Threshold Bar Chart displays the latest value of one or more datasets as bars, with each bar split into two stacked segments: the portion up to a configured threshold and the overflow above it. Each segment is colored independently, so a single glance reveals both the current value and how far it exceeds its limit — ideal for budget-versus-overage style monitoring.

Features #

• Per-dataset threshold value with separate base and overflow colors
• Stacked-bar rendering of base + overflow segments
• Custom title and color per dataset
• Optional Y-axis display (hidden by default for a compact look)
• Configurable auto-refresh via updateFrequency
• Click a bar to open the dataset chart dialog; Ctrl+click to add datasets to a multi-selection
• Copy chart to clipboard from the mode bar
• Supports multiple datasets side by side on a shared X axis

Use Cases #

• Monitoring resource usage against quotas (e.g., energy budget vs. overage)
• Visualizing equipment load relative to rated capacity
• Tracking KPIs against operational targets with at-a-glance over/under signaling
• Comparing several assets against their individual thresholds in one view

Example #