diff --git a/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/RankMetricsCalculator.kt b/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/RankMetricsCalculator.kt
index be9fcd7..c839899 100644
--- a/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/RankMetricsCalculator.kt
+++ b/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/RankMetricsCalculator.kt
@@ -21,9 +21,7 @@ interface RankMetricsCalculator {
      * @param rankedResults the ranked results as a list of sorted lists (most relevant artifacts first). Each list represents one query of a source artifact.
      * @param groundTruth the ground truth
      * @param stringProvider a function to convert the ranked results and ground truth to strings
-     * @param rankedRelevances An optional list of lists representing the relevance scores associated with each ranked result.
-     *                         If provided, this list must correspond to `rankedResults` in structure. If `null`, the relevance scores are ignored.
-     * @param doubleProvider A function that converts the ranked relevances into their double representations.
+     * @param relevanceBasedInput the input for relevance based calculations
      *
      * @return the rank metrics result
      */
@@ -31,28 +29,44 @@ interface RankMetricsCalculator {
         rankedResults: List<List<T>>,
         groundTruth: Set<T>,
         stringProvider: (T) -> String,
-        rankedRelevances: List<List<T>>?,
-        doubleProvider: (T) -> Double
+        relevanceBasedInput: RelevanceBasedInput<T>?
     ): SingleRankMetricsResult {
         return calculateMetrics(
             rankedResults.map { id -> id.map { stringProvider(it) } },
             groundTruth.map { stringProvider(it) }.toSet(),
-            rankedRelevances?.map { id -> id.map { doubleProvider(it) } }
+            relevanceBasedInput?.let { rbi ->
+                RelevanceBasedInput(
+                    rbi.rankedRelevances.map { id -> id.map { rbi.doubleProvider(it) } },
+                    { it },
+                    rbi.biggerIsMoreSimilar
+                )
+            }
         )
     }
 
+    /**
+     * @param rankedRelevances An optional list of lists representing the relevance scores associated with each ranked result.
+     *                         If provided, this list must correspond to `rankedResults` in structure. If `null`, the relevance scores are ignored.
+     * @param doubleProvider A function that converts the ranked relevances into their double representations.
+     * @param biggerIsMoreSimilar Whether the relevance scores are more similar if bigger
+     */
+    data class RelevanceBasedInput<T>(
+        val rankedRelevances: List<List<T>>,
+        val doubleProvider: ((T) -> Double),
+        val biggerIsMoreSimilar: Boolean
+    )
+
     /**
      * Calculates the metrics for the given ranked results.
      * @param rankedResults the ranked results as a list of sorted lists (most relevant artifacts first). Each list represents one query of a source artifact.
      * @param groundTruth the ground truth
-     * @param rankedRelevances An optional list of lists representing the relevance scores associated with each ranked result.
-     *                         If provided, this list must correspond to `rankedResults` in structure. If `null`, the relevance scores are ignored.
+     * @param relevanceBasedInput the input for relevance based calculation
      * @return the rank metrics result
      */
     fun calculateMetrics(
         rankedResults: List<List<String>>,
         groundTruth: Set<String>,
-        rankedRelevances: List<List<Double>>?
+        relevanceBasedInput: RelevanceBasedInput<Double>?
     ): SingleRankMetricsResult
 
     /**
diff --git a/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/calculation/RankMetrics.kt b/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/calculation/RankMetrics.kt
index 3e37b46..e94e647 100644
--- a/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/calculation/RankMetrics.kt
+++ b/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/calculation/RankMetrics.kt
@@ -85,7 +85,8 @@ fun calculateLAG(
 fun calculateAUC(
     rankedResults: List<List<String>>,
     rankedRelevances: List<List<Double>>,
-    groundTruth: Set<String>
+    groundTruth: Set<String>,
+    biggerIsMoreSimilar: Boolean
 ): Double {
     require(rankedResults.size == rankedRelevances.size) {
         "Results and relevance lists must have the same size."
@@ -103,7 +104,7 @@ fun calculateAUC(
         flattenedTPLabels += results.map { groundTruth.contains(it) }
     }
 
-    return calculateAUC(calculateROC(flattenedRelevances, flattenedTPLabels))
+    return calculateAUC(calculateROC(flattenedRelevances, flattenedTPLabels, biggerIsMoreSimilar))
 }
 
 /**
@@ -127,13 +128,14 @@ fun calculateAUC(
  */
 fun calculateROC(
     relevances: List<Double>,
-    isTPLabels: List<Boolean>
+    isTPLabels: List<Boolean>,
+    biggerIsMoreSimilar: Boolean
 ): List<DoubleArray> {
     require(relevances.size == isTPLabels.size) { "Relevances and labels must have the same length" }
 
     // Create a list of pairs (relevance, isTPLabel) and sort it by relevance in descending order
     val relevanceIsTPList: MutableList<Pair<Double, Boolean>> = relevances.zip(isTPLabels).toMutableList()
-    relevanceIsTPList.sortByDescending { it.first }
+    if (biggerIsMoreSimilar) relevanceIsTPList.sortByDescending { it.first } else relevanceIsTPList.sortBy { it.first }
 
     // Initialize variables for TPR and FPR
     val totalPositives = isTPLabels.count { it }
diff --git a/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/internal/RankMetricsCalculatorImpl.kt b/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/internal/RankMetricsCalculatorImpl.kt
index 62b205d..76edc64 100644
--- a/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/internal/RankMetricsCalculatorImpl.kt
+++ b/calculator/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/internal/RankMetricsCalculatorImpl.kt
@@ -12,13 +12,13 @@ internal class RankMetricsCalculatorImpl : RankMetricsCalculator {
     override fun calculateMetrics(
         rankedResults: List<List<String>>,
         groundTruth: Set<String>,
-        rankedRelevances: List<List<Double>>?
+        relevanceBasedInput: RankMetricsCalculator.RelevanceBasedInput<Double>?
     ): SingleRankMetricsResult {
         require(rankedResults.isNotEmpty())
         require(rankedResults.all { it.size == rankedResults.first().size })
         val map = calculateMAP(rankedResults, groundTruth)
         val lag = calculateLAG(rankedResults, groundTruth)
-        val auc = rankedRelevances?.let { calculateAUC(rankedResults, it, groundTruth) }
+        val auc = relevanceBasedInput?.let { calculateAUC(rankedResults, it.rankedRelevances, groundTruth, it.biggerIsMoreSimilar) }
         return SingleRankMetricsResult(map, lag, auc, groundTruth.size)
     }
 
diff --git a/cli/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/cli/commands/RankCommand.kt b/cli/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/cli/commands/RankCommand.kt
index 9b6a5a4..76257fe 100644
--- a/cli/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/cli/commands/RankCommand.kt
+++ b/cli/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/cli/commands/RankCommand.kt
@@ -15,16 +15,10 @@ import java.io.File
 @OptIn(ExperimentalCli::class)
 class RankCommand(private val outputFileOption: SingleNullableOption<String>) : Subcommand("rank", "Calculates rank metrics") {
     private val rankedListDirectoryOption by option(
-        ArgType.String,
-        shortName = "r",
-        description = "The directory of the ranked list files",
-        fullName = "ranked-list-directory"
+        ArgType.String, shortName = "r", description = "The directory of the ranked list files", fullName = "ranked-list-directory"
     ).required()
     private val groundTruthFileOption by option(
-        ArgType.String,
-        shortName = "g",
-        description = "The ground truth file",
-        fullName = "ground-truth"
+        ArgType.String, shortName = "g", description = "The ground truth file", fullName = "ground-truth"
     ).required()
     private val fileHeaderOption by option(ArgType.Boolean, description = "Whether the files have a header", fullName = "header").default(false)
     private val rankedRelevanceListDirectoryOption by option(
@@ -32,7 +26,11 @@ class RankCommand(private val outputFileOption: SingleNullableOption<String>) :
         shortName = "rrl",
         description = "The directory of the ranked relevance list files",
         fullName = "ranked-relevance-list-directory"
-    ).default("")
+    )
+    private val biggerIsMoreSimilar by option(
+        ArgType.String, shortName = "b", description = "Whether the relevance scores are more similar if bigger", fullName = "bigger-is-more-similar"
+    )
+
 
     override fun execute() {
         println("Calculating rank metrics")
@@ -47,39 +45,41 @@ class RankCommand(private val outputFileOption: SingleNullableOption<String>) :
             println("The provided path is not a directory")
             return
         }
-        val rankedResults: List<List<String>> =
-            rankedListDirectory.listFiles()?.filter { file ->
-                file.isFile
-            }?.map { file -> file.readLines().filter { it.isNotBlank() }.drop(if (fileHeaderOption) 1 else 0) } ?: emptyList()
+        val rankedResults: List<List<String>> = rankedListDirectory.listFiles()?.filter { file ->
+            file.isFile
+        }?.map { file -> file.readLines().filter { it.isNotBlank() }.drop(if (fileHeaderOption) 1 else 0) } ?: emptyList()
         if (rankedResults.isEmpty()) {
             println("No classification results found")
             return
         }
         val groundTruth = groundTruthFile.readLines().filter { it.isNotBlank() }.drop(if (fileHeaderOption) 1 else 0).toSet()
 
-        var rankedRelevances: List<List<Double>>? = null
-        if (rankedRelevanceListDirectoryOption != "") {
-            val rankedRelevanceListDirectory = File(rankedRelevanceListDirectoryOption)
+        var relevanceBasedInput: RankMetricsCalculator.RelevanceBasedInput<Double>? = null
+        if (rankedRelevanceListDirectoryOption != null) {
+            val rankedRelevanceListDirectory = File(rankedRelevanceListDirectoryOption!!)
             if (!rankedRelevanceListDirectory.exists() || !rankedRelevanceListDirectory.isDirectory) {
                 println("The directory of the ranked relevance list files does not exist or is not a directory")
                 return
             }
-            rankedRelevances = rankedRelevanceListDirectory.listFiles()?.filter { file ->
+            val rankedRelevances = rankedRelevanceListDirectory.listFiles()?.filter { file ->
                 file.isFile
             }?.map { file -> file.readLines().filter { it.isNotBlank() }.map { it.toDouble() }.drop(if (fileHeaderOption) 1 else 0) } ?: emptyList()
             if (rankedRelevances.isEmpty()) {
                 println("No relevance scores found")
                 return
             }
+            if (biggerIsMoreSimilar == null) {
+                throw IllegalArgumentException("ranked relevances and bigger is more similar can only occur together")
+            }
+            relevanceBasedInput = if (biggerIsMoreSimilar != null) RankMetricsCalculator.RelevanceBasedInput(
+                rankedRelevances, { it }, biggerIsMoreSimilar.toBoolean()
+            ) else null
         }
         val rankMetrics = RankMetricsCalculator.Instance
 
-        val result =
-            rankMetrics.calculateMetrics(
-                rankedResults,
-                groundTruth,
-                rankedRelevances
-            )
+        val result = rankMetrics.calculateMetrics(
+            rankedResults, groundTruth, relevanceBasedInput
+        )
         result.prettyPrint()
 
         val output = outputFileOption.value
diff --git a/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/ClassificationMetricsController.kt b/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/ClassificationMetricsController.kt
index b6312a7..7c7eedb 100644
--- a/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/ClassificationMetricsController.kt
+++ b/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/ClassificationMetricsController.kt
@@ -15,9 +15,7 @@ import org.springframework.web.bind.annotation.RestController
 class ClassificationMetricsController {
     @Operation(summary = "Check if the service is running")
     @GetMapping
-    fun running(): String {
-        return "ClassificationMetricsController is running"
-    }
+    fun running(): String = "ClassificationMetricsController is running"
 
     @Operation(summary = "Calculate classification metrics for one project")
     @PostMapping
diff --git a/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/RankMetricsController.kt b/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/RankMetricsController.kt
index cb750aa..fb41a90 100644
--- a/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/RankMetricsController.kt
+++ b/rest/src/main/kotlin/edu/kit/kastel/mcse/ardoco/metrics/rest/controller/RankMetricsController.kt
@@ -25,10 +25,22 @@ class RankMetricsController {
         @RequestBody body: RankMetricsRequest
     ): SingleRankMetricsResult {
         val rankMetricsCalculator = RankMetricsCalculator.Instance
-        val result = rankMetricsCalculator.calculateMetrics(body.rankedResults, body.groundTruth, body.rankedRelevances)
+        val relevanceBasedInput = relevanceBasedInput(body)
+        val result = rankMetricsCalculator.calculateMetrics(body.rankedResults, body.groundTruth, relevanceBasedInput)
         return result
     }
 
+    private fun relevanceBasedInput(body: RankMetricsRequest): RankMetricsCalculator.RelevanceBasedInput<Double>? {
+        if ((body.rankedRelevances == null) != (body.biggerIsMoreSimilar == null)) {
+            throw IllegalArgumentException("ranked relevances and bigger is more similar can only occur together")
+        }
+        val relevanceBasedInput =
+            if (body.rankedRelevances != null && body.biggerIsMoreSimilar != null) RankMetricsCalculator.RelevanceBasedInput(
+                body.rankedRelevances, { it }, body.biggerIsMoreSimilar
+            ) else null
+        return relevanceBasedInput
+    }
+
     @Operation(summary = "Calculate rank metrics for multiple projects. Calculate the average and optionally a weighted average.")
     @PostMapping("/average")
     fun calculateMultipleRankMetrics(
@@ -37,10 +49,10 @@ class RankMetricsController {
         val rankMetricsCalculator = RankMetricsCalculator.Instance
 
         val requests = body.rankMetricsRequests
-        val results =
-            requests.map {
-                rankMetricsCalculator.calculateMetrics(it.rankedResults, it.groundTruth, it.rankedRelevances)
-            }
+        val results = requests.map {
+            val relevanceBasedInput = relevanceBasedInput(it)
+            rankMetricsCalculator.calculateMetrics(it.rankedResults, it.groundTruth, relevanceBasedInput)
+        }
 
         val averages = rankMetricsCalculator.calculateAverages(results, body.weights)
 
@@ -48,8 +60,7 @@ class RankMetricsController {
     }
 
     data class AverageRankMetricsRequest(
-        val rankMetricsRequests: List<RankMetricsRequest>,
-        val weights: List<Int>? = null
+        val rankMetricsRequests: List<RankMetricsRequest>, val weights: List<Int>? = null
     )
 
     data class AverageRankMetricsResponse(
@@ -59,6 +70,7 @@ class RankMetricsController {
     data class RankMetricsRequest(
         val rankedResults: List<List<String>>,
         val groundTruth: Set<String>,
-        val rankedRelevances: List<List<Double>>?
+        val rankedRelevances: List<List<Double>>?,
+        val biggerIsMoreSimilar: Boolean?
     )
 }