diff --git a/cue-ios/CueIOS/Models/LsvAnalysis.swift b/cue-ios/CueIOS/Models/LsvAnalysis.swift
index f436219..357ab5f 100644
--- a/cue-ios/CueIOS/Models/LsvAnalysis.swift
+++ b/cue-ios/CueIOS/Models/LsvAnalysis.swift
@@ -79,9 +79,13 @@ func detectLsvPeaks(_ points: [LsvPoint]) -> [LsvPeak] {
     for i in 1..<smoothed.count {
         let prev = smoothed[i - 1]
         let curr = smoothed[i]
-        if prev.sign != curr.sign && prev != 0 {
-            let frac = abs(prev) / (abs(prev) + abs(curr))
-            let vCross = vVals[i - 1] + frac * (vVals[i] - vVals[i - 1])
+        let crossed = (prev > 0 && curr < 0) || (prev < 0 && curr > 0)
+        if crossed {
+            let aPrev = abs(prev)
+            let aCurr = abs(curr)
+            let frac = aPrev / (aPrev + aCurr)
+            let dv = vVals[i] - vVals[i - 1]
+            let vCross = vVals[i - 1] + frac * dv
             peaks.append(LsvPeak(vMv: vCross, iUa: 0, kind: .crossover))
             break
         }