diff --git a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/PercentileCustomAggregator.java b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/PercentileCustomAggregator.java
index 9f49073..04c22ed 100644
--- a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/PercentileCustomAggregator.java
+++ b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/PercentileCustomAggregator.java
@@ -11,22 +11,20 @@ import java.nio.file.Path;
 
 import org.lucares.collections.IntList;
 
-public class PercentileCustomAggregator implements CustomAggregator{
+public class PercentileCustomAggregator implements CustomAggregator {
+
+	private final static int POINTS = 500;
 
-	private final static int POINTS = 100;
-	
 	private final IntList values = new IntList(); // TODO should be a LongList
 
-	private Path tmpDir;
+	private final Path tmpDir;
 
-	
-
-	public PercentileCustomAggregator(Path tmpDir) {
+	public PercentileCustomAggregator(final Path tmpDir) {
 		this.tmpDir = tmpDir;
 	}
 
 	@Override
-	public void addValue(long epochMilli, long value) {
+	public void addValue(final long epochMilli, final long value) {
 		values.add((int) value);
 	}
 
@@ -34,24 +32,24 @@ public class PercentileCustomAggregator implements CustomAggregator{
 	public AggregatedData getAggregatedData() throws IOException {
 		final char separator = ',';
 		final char newline = '\n';
-		
+
 		values.parallelSort();
-		
+
 		final IntList percentiles = new IntList(POINTS);
 		final File dataFile = File.createTempFile("data", ".dat", tmpDir.toFile());
-		try(final Writer output = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dataFile), StandardCharsets.US_ASCII));){
-			
+		try (final Writer output = new BufferedWriter(
+				new OutputStreamWriter(new FileOutputStream(dataFile), StandardCharsets.US_ASCII));) {
+
 			final StringBuilder data = new StringBuilder();
 			if (values.size() > 0) {
 				// compute the percentiles
 				for (int i = 0; i < POINTS; i++) {
-					data.append(i* (100/(double)POINTS));
+					data.append(i * (100 / (double) POINTS));
 					data.append(separator);
-					int percentile = values.get((int) Math.floor(values.size()
-							/ ((double)POINTS) * i));
+					final int percentile = values.get((int) Math.floor(values.size() / ((double) POINTS) * i));
 					data.append(percentile);
 					data.append(newline);
-					
+
 					percentiles.add(percentile);
 				}
 				final int maxValue = values.get(values.size() - 1);
@@ -61,12 +59,11 @@ public class PercentileCustomAggregator implements CustomAggregator{
 				data.append(newline);
 			}
 			output.write(data.toString());
-			
+
 		}
 		// TODO remove:
-		double average = percentiles.stream().summaryStatistics().getAverage();
-		
-		
+		final double average = percentiles.stream().summaryStatistics().getAverage();
+
 		final String title = String.format("percentiles");
 		return new AggregatedData(title, dataFile, average);
 	}
diff --git a/pdb-plotting/src/main/java/org/lucares/recommind/logs/ScatterPlot.java b/pdb-plotting/src/main/java/org/lucares/recommind/logs/ScatterPlot.java
index aa17ba7..9ee0a25 100644
--- a/pdb-plotting/src/main/java/org/lucares/recommind/logs/ScatterPlot.java
+++ b/pdb-plotting/src/main/java/org/lucares/recommind/logs/ScatterPlot.java
@@ -205,9 +205,15 @@ public class ScatterPlot {
 		final long fromEpochMilli = dateFrom.toInstant().toEpochMilli();
 		final long toEpochMilli = dateTo.toInstant().toEpochMilli();
 		final boolean useMillis = (toEpochMilli - fromEpochMilli) < TimeUnit.MINUTES.toMillis(5);
+
+		final long minValue = plotSettings.getYRangeUnit() == TimeRangeUnitInternal.AUTOMATIC ? 0
+				: plotSettings.getYRangeUnit().toMilliSeconds(plotSettings.getYRangeMin());
+		final long maxValue = plotSettings.getYRangeUnit() == TimeRangeUnitInternal.AUTOMATIC ? Long.MAX_VALUE
+				: plotSettings.getYRangeUnit().toMilliSeconds(plotSettings.getYRangeMax());
+
 		final CustomAggregator aggregator = plotSettings.getAggregate().createCustomAggregator(tmpDir);
 
-		long maxValue = 0;
+		long statsMaxValue = 0;
 		long ignoredValues = 0;
 		final int separator = ',';
 		final int newline = '\n';
@@ -221,39 +227,44 @@ public class ScatterPlot {
 				final Entry entry = it.next();
 
 				final long epochMilli = entry.getEpochMilli();
-				if (fromEpochMilli <= epochMilli && epochMilli <= toEpochMilli) {
-
-					final long value = entry.getValue();
-					final String stringValue = LongUtils.longToString(value);
-					final String formattedDate;
-
-					if (useMillis) {
-						formattedDateBuilder.delete(0, formattedDateBuilder.length());
-						formatter.format("%.3f", epochMilli / 1000.0);
-						formattedDate = formattedDateBuilder.toString();
-					} else {
-						formattedDate = String.valueOf(epochMilli / 1000);
-					}
-
-					output.write(formattedDate);
-					output.write(separator);
-					output.write(stringValue);
-					output.write(newline);
-
-					aggregator.addValue(epochMilli, value);
-
-					count++;
-					maxValue = Math.max(maxValue, value);
-				} else {
+				if (fromEpochMilli > epochMilli || epochMilli > toEpochMilli) {
 					ignoredValues++;
+					continue;
 				}
+
+				final long value = entry.getValue();
+				aggregator.addValue(epochMilli, value);
+				if (value < minValue || value > maxValue) {
+					ignoredValues++;
+					continue;
+				}
+
+				final String stringValue = LongUtils.longToString(value);
+				final String formattedDate;
+
+				if (useMillis) {
+					formattedDateBuilder.delete(0, formattedDateBuilder.length());
+					formatter.format("%.3f", epochMilli / 1000.0);
+					formattedDate = formattedDateBuilder.toString();
+				} else {
+					formattedDate = String.valueOf(epochMilli / 1000);
+				}
+
+				output.write(formattedDate);
+				output.write(separator);
+				output.write(stringValue);
+				output.write(newline);
+
+				count++;
+				statsMaxValue = Math.max(statsMaxValue, value);
+
 			}
 		}
 
 		METRICS_LOGGER.debug("wrote {} values to csv in: {}ms (ignored {} values) use millis: {}, grouping={}, file={}",
 				count, (System.nanoTime() - start) / 1_000_000.0, ignoredValues, Boolean.toString(useMillis),
 				groupResult.getGroupedBy().asString(), dataFile);
-		return new CsvSummary(dataFile, count, maxValue, aggregator.getAggregatedData());
+		return new CsvSummary(dataFile, count, statsMaxValue, aggregator.getAggregatedData());
 	}
 
 	static String uniqueDirectoryName() {