diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
index 68da804..1e5329c 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
@@ -908,7 +908,7 @@ data class PlacementGuideResult(
     val nextPhase: PlacementPhase = PlacementPhase.VERTICAL
 )
 
-private const val DEFAULT_CV_THR = 0.10
+private const val DEFAULT_CV_THR = 0.08
 private const val DEFAULT_LR_DEV_THR = 0.25
 
 /**
@@ -1104,8 +1104,8 @@ private fun computePlacementGuide(
     val std = kotlin.math.sqrt(depths.map { (it - mean) * (it - mean) }.average())
     val cv = if (mean > 0) std / mean else Double.MAX_VALUE
 
-    val relaxStep = (repeatCount / 8).coerceAtMost(2)
-    val cvThr = DEFAULT_CV_THR + relaxStep * 0.05
+    val relaxStep = (repeatCount / 10).coerceAtMost(2)
+    val cvThr = DEFAULT_CV_THR + relaxStep * 0.03
 
     // LR deviation
     var lrDev = Double.NaN