diff --git a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
index 1b45de0..9aeb193 100644
--- a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
+++ b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
@@ -766,6 +766,7 @@ class HemoCubeFragment : Fragment() {
             val led3Average = log10(led3BufferForDevice.div(led3SampleForDevice))
             val led4Average = log10(led4BufferForDevice.div(led4SampleForDevice))
             val deviceRatio = led2Average / led1Average
+            val borderlineMetric = (led1Average - led2Average) / deviceRatio
 
             if (led1BufferForDevice < Constants.BUFFER_INTENSITY_THRESHOLDS[deviceHardwareId]?.get(0)
                     ?.get(0)!!
@@ -911,7 +912,11 @@ class HemoCubeFragment : Fragment() {
                 this.prdClassification = absorbanceBasedClassification(predictedDenovixRatio)
                 this.deviceRatioClass = deviceRatioClassification(deviceRatio)
                 this.slopeRatioClass = slopeClass
-                this.classificationResult = deviceRatioClass
+                this.classificationResult = findResultWithAdditionalMethods(
+                    deviceRatio,
+                    deviceRatioClass,
+                    borderlineMetric
+                )
                 hemoCubeViewModel.messages.postValue(
                     "${this.classificationResult} \n Device Ratio: ${
                         "%.3f".format(
@@ -955,14 +960,22 @@ class HemoCubeFragment : Fragment() {
     fun findResultWithAdditionalMethods(
         deviceRatio: Double?,
         deviceRatioClass: String?,
-        slopeRatio: Double?,
+        borderlineMetric: Double?,
     ): String {
         try {
 //            hemoCubeViewModel.messages.postValue("post classification checks")
-            if (deviceRatio != null) {
-                if (slopeRatio != null) {
-                    if (deviceRatioClass == "Normal" && slopeRatio > 45.0)
-                        return "Negative Borderline, Repeat Test"
+            if (deviceRatio != null && borderlineMetric != null) {
+                if (deviceRatioClass == "Negative Borderline") {
+                    return if (borderlineMetric >= 2.4)
+                        "Borderline. Normal"
+                    else
+                        "Borderline. Sickle Cell Trait"
+                }
+                if (deviceRatioClass == "Positive for Sickle Cell. HPLC for Confirmation") {
+                    return if (borderlineMetric >= 1.34)
+                        "Borderline. Sickle Cell Trait"
+                    else
+                        "Borderline. Sickle Cell Disease"
                 }
             }
         } catch (e: Exception) {
@@ -975,17 +988,17 @@ class HemoCubeFragment : Fragment() {
     fun deviceRatioClassification(ratio: Double?): String {
         try {
             if (ratio != null) {
-                if (ratio in 0.016..0.22) {
+                if (ratio in 0.16..0.22) {
 //                    setSubtitleTextColor(R.color.green_2)
                     return "Normal"
                 }
-                if (ratio in 0.22..0.24)
+                if (ratio in 0.23..0.25)
                     return "Negative Borderline"
-                if (ratio in 0.24..0.32)
+                if (ratio in 0.25..0.31)
                     return "Sickle Cell Trait"
-                if (ratio in 0.32..0.37)
+                if (ratio in 0.31..0.36)
                     return "Positive for Sickle Cell. HPLC for Confirmation"
-                if (ratio in 0.37..0.56)
+                if (ratio in 0.36..0.56)
                     return "Sickle Cell Disease"
             } else {
                 return "Invalid"
diff --git a/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt b/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt
index d8e2a7e..dee8880 100644
--- a/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt
+++ b/app/src/test/java/com/example/hpostesting/HemoCubeFragmentTest.kt
@@ -316,6 +316,13 @@ class HemoCubeFragmentTest {
         assertEquals("HPP-000-5001", result)
     }
 
+    @Test
+    fun testDeviceRatioClassificationNormalWithStartRange() {
+        val ratio = 0.16
+        val result = hemoCubeFragment.deviceRatioClassification(ratio)
+        assertEquals("Normal", result)
+    }
+
     @Test
     fun testDeviceRatioClassificationNormal() {
         val ratio = 0.22
@@ -331,19 +338,33 @@ class HemoCubeFragmentTest {
     }
 
     @Test
-    fun testDeviceRatioClassificationSickleCellTrait() {
-        val ratio = 0.25
+    fun testDeviceRatioClassificationSickleCellTraitLowerBound() {
+        val ratio = 0.251
+        val result = hemoCubeFragment.deviceRatioClassification(ratio)
+        assertEquals("Sickle Cell Trait", result)
+    }
+
+    @Test
+    fun testDeviceRatioClassificationSickleCellTraitUpperBound() {
+        val ratio = 0.309
         val result = hemoCubeFragment.deviceRatioClassification(ratio)
         assertEquals("Sickle Cell Trait", result)
     }
 
     @Test
     fun testDeviceRatioClassificationPositiveForSickleCell() {
-        val ratio = 0.37
+        val ratio = 0.359
         val result = hemoCubeFragment.deviceRatioClassification(ratio)
         assertEquals("Positive for Sickle Cell. HPLC for Confirmation", result)
     }
 
+    @Test
+    fun testDeviceRatioClassificationSickleCellDiseaseLowerBound() {
+        val ratio = 0.361
+        val result = hemoCubeFragment.deviceRatioClassification(ratio)
+        assertEquals("Sickle Cell Disease", result)
+    }
+
     @Test
     fun testDeviceRatioClassificationSickleCellDisease() {
         val ratio = 0.45
@@ -359,10 +380,31 @@ class HemoCubeFragmentTest {
     }
 
     @Test
-    fun findResultWithAdditionalMethods_ValidInput_ReturnsNegativeBorderlineRepeatTest() {
+    fun findResultWithAdditionalMethods_ValidInput_ReturnsBorderlineNormal() {
 //        `when`(hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Normal", 70.0)).thenReturn("Negative Borderline, Repeat Test")
-        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Normal", 70.0)
-        assertEquals("Negative Borderline, Repeat Test", result)
+        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Negative Borderline", 2.5)
+        assertEquals("Borderline. Normal", result)
+    }
+
+    @Test
+    fun findResultWithAdditionalMethods_ValidInput_ReturnsBorderlineSickleCellTrait1() {
+//        `when`(hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Normal", 70.0)).thenReturn("Negative Borderline, Repeat Test")
+        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Negative Borderline", 2.2)
+        assertEquals("Borderline. Sickle Cell Trait", result)
+    }
+
+    @Test
+    fun findResultWithAdditionalMethods_ValidInput_ReturnsBorderlineSickleCellTrait2() {
+//        `when`(hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Normal", 70.0)).thenReturn("Negative Borderline, Repeat Test")
+        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Positive for Sickle Cell. HPLC for Confirmation", 1.35)
+        assertEquals("Borderline. Sickle Cell Trait", result)
+    }
+
+    @Test
+    fun findResultWithAdditionalMethods_ValidInput_ReturnsBorderlineSickleCellDisease() {
+//        `when`(hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Normal", 70.0)).thenReturn("Negative Borderline, Repeat Test")
+        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Positive for Sickle Cell. HPLC for Confirmation", 1.33)
+        assertEquals("Borderline. Sickle Cell Disease", result)
     }
 
     @Test
@@ -389,8 +431,8 @@ class HemoCubeFragmentTest {
     @Test
     fun findResultWithAdditionalMethods_PBL_ReturnsPBL() {
 //        `when`(hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Abnormal", 70.0)).thenReturn("Invalid")
-        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Positive for Sickle Cell. HPLC for Confirmation", 70.0)
-        assertEquals("Positive for Sickle Cell. HPLC for Confirmation", result)
+        val result = hemoCubeFragment.findResultWithAdditionalMethods(0.5, "Positive for Sickle Cell. HPLC for Confirmation", 1.35)
+        assertEquals("Borderline. Sickle Cell Trait", result)
     }
 
     @Test