diff --git a/Common/Extensions/SampleValue.swift b/Common/Extensions/SampleValue.swift
index b85fec0145..40d9faab4d 100644
--- a/Common/Extensions/SampleValue.swift
+++ b/Common/Extensions/SampleValue.swift
@@ -8,6 +8,14 @@
 import LoopKit
 import LoopAlgorithm
 
+extension SampleValue {
+    /// A glucose value entered by hand, such as a fingerstick or calibration.
+    var isManualGlucose: Bool {
+        guard let sample = self as? GlucoseSampleValue else { return false }
+        return sample.wasUserEntered && !sample.isDisplayOnly
+    }
+}
+
 extension Collection where Element == SampleValue {
     /// O(n)
     var quantityRange: ClosedRange<LoopQuantity>? {
diff --git a/WatchApp Extension/Managers/ComplicationChartManager.swift b/WatchApp Extension/Managers/ComplicationChartManager.swift
index 3d4268afa8..4be94984ff 100644
--- a/WatchApp Extension/Managers/ComplicationChartManager.swift	
+++ b/WatchApp Extension/Managers/ComplicationChartManager.swift	
@@ -16,6 +16,7 @@ private let textInsets = UIEdgeInsets(top: 2, left: 2, bottom: 2, right: 2)
 
 extension CGSize {
     fileprivate static let glucosePoint = CGSize(width: 2, height: 2)
+    fileprivate static let manualGlucosePoint = CGSize(width: 3, height: 3)
 }
 
 extension NSAttributedString {
@@ -150,12 +151,13 @@ final class ComplicationChartManager {
     }
 
     private func drawHistoricalGlucose(in context: CGContext, using scaler: GlucoseChartScaler) {
-        context.setFillColor(UIColor.glucose.cgColor)
         data?.historicalGlucose?.lazy.filter {
             scaler.dates.contains($0.startDate)
         }.forEach { glucose in
             let origin = scaler.point(for: glucose, unit: unit)
-            let glucoseRect = CGRect(origin: origin, size: .glucosePoint).alignedToScreenScale(WKInterfaceDevice.current().screenScale)
+            let size: CGSize = glucose.isManualGlucose ? .manualGlucosePoint : .glucosePoint
+            let glucoseRect = CGRect(origin: origin, size: size).alignedToScreenScale(WKInterfaceDevice.current().screenScale)
+            context.setFillColor((glucose.isManualGlucose ? UIColor.red : UIColor.glucose).cgColor)
             context.fill(glucoseRect)
         }
     }
diff --git a/WatchApp Extension/Scenes/GlucoseChartScene.swift b/WatchApp Extension/Scenes/GlucoseChartScene.swift
index 0c7c6473ac..c582d75b4e 100644
--- a/WatchApp Extension/Scenes/GlucoseChartScene.swift	
+++ b/WatchApp Extension/Scenes/GlucoseChartScene.swift	
@@ -291,10 +291,10 @@ class GlucoseChartScene: SKScene {
 
         data.historicalGlucose?.filter { scaler.dates.contains($0.startDate) }.forEach {
             let center = scaler.point($0.startDate, $0.quantity.doubleValue(for: unit))
-            let size = CGSize(width: 2, height: 2)
+            let size = $0.isManualGlucose ? CGSize(width: 3, height: 3) : CGSize(width: 2, height: 2)
             let origin = CGPoint(x: center.x - size.width / 2, y: center.y - size.height / 2)
             let (sprite, created) = getSprite(forHash: $0.chartHashValue)
-            sprite.color = .glucose
+            sprite.color = $0.isManualGlucose ? .red : .glucose
             sprite.zPosition = NodePlane.values.zPosition
             sprite.move(to: CGRect(origin: origin, size: size).alignedToScreenScale(WKInterfaceDevice.current().screenScale), animated: !created)
             inactiveNodes.removeValue(forKey: $0.chartHashValue)