diff --git a/core/client.js b/core/client.js
index 52d66d8a..69faaf48 100644
--- a/core/client.js
+++ b/core/client.js
@@ -313,9 +313,11 @@ class TfSparkLineElement extends LitElement {
 	}
 
 	render() {
+		let max = Math.round(10.0 * Math.max(...this.lines.map(line => line.values[line.values.length - 1]))) / 10.0;
 		return html`
 			<svg style="width: 10em; height: 1.4em; vertical-align: top; margin: 0; padding: 0; background: #000" viewBox="0 0 100 10" preserveAspectRatio="none" xmlns="http://www.w3.org/2000/svg">
 				${this.lines.map(x => this.render_line(x))}
+				<text x="0" y="1em" style="font: 8px sans-serif; fill: #fff">${max}</text>
 			</svg>
 		`;
 	}