diff --git a/src/main/java/ats/plugin/OHLCPlugInView.java b/src/main/java/ats/plugin/OHLCPlugInView.java
index 936d125..8f55cae 100644
--- a/src/main/java/ats/plugin/OHLCPlugInView.java
+++ b/src/main/java/ats/plugin/OHLCPlugInView.java
@@ -34,9 +34,9 @@ public class OHLCPlugInView extends ViewSupport {
     private static final Logger log = LoggerFactory.getLogger(OHLCPlugInView.class);
     private static final int LATE_EVENT_SLACK_SECONDS = 5;
     private static final PeriodFormatter periodFormatter = new PeriodFormatterBuilder()
-        .appendDays().appendSuffix("d ")
-        .appendHours().appendSuffix("h ")
-        .appendMinutes().appendSuffix("m ")
+        .appendDays().appendSuffix("d")
+        .appendHours().appendSuffix("h")
+        .appendMinutes().appendSuffix("m")
         .appendSeconds().appendSuffix("s")
         .toFormatter();
 
@@ -78,7 +78,15 @@ public class OHLCPlugInView extends ViewSupport {
     private Duration parseInterval(ExprNode interval) {
         ExprEvaluator evaluator = interval.getForge().getExprEvaluator();
         String intervalStr = (String)evaluator.evaluate(null, true, agentContext);
-        return periodFormatter.parsePeriod(intervalStr).toStandardDuration();
+        return parseInterval(intervalStr);
+    }
+
+    /**
+     * Return the time period specified by the given string.
+     */
+    public static Duration parseInterval(String interval) {
+        interval = interval.replaceAll("\\s+","");
+        return periodFormatter.parsePeriod(interval).toStandardDuration();
     }
 
     /**
diff --git a/src/test/java/ats/plugin/OHLCPlugInViewTest.java b/src/test/java/ats/plugin/OHLCPlugInViewTest.java
index 37b4f7e..d17cb03 100644
--- a/src/test/java/ats/plugin/OHLCPlugInViewTest.java
+++ b/src/test/java/ats/plugin/OHLCPlugInViewTest.java
@@ -43,14 +43,27 @@ public class OHLCPlugInViewTest {
 
 		expected += ".000Z";
 
-        log.info("  duration: {}", interval);
-        log.info("  cur time: {}", dateFormatter.print(currentTime));
-        log.info("start time: {}", start);
-        log.info("  expected: {}", expected);
+        // log.info("  duration: {}", interval);
+        // log.info("  cur time: {}", dateFormatter.print(currentTime));
+        // log.info("start time: {}", start);
+        // log.info("  expected: {}", expected);
 
         //assertEquals(interval.toString(), l.longValue(), Instant.parse("2018-05-15T13:23:00").getMillis());
         assertEquals(interval.toString(), expected, start);
     }
+
+    @Test
+    public void testParseInterval() {
+        assertParseInterval("4s", new Duration(4 * 1000));
+        assertParseInterval("4m", new Duration(4 * 60 * 1000));
+        assertParseInterval("1m5s", new Duration(65 * 1000));
+        assertParseInterval("1m 5s", new Duration(65 * 1000));
+    }
+
+    private void assertParseInterval(String str, Duration expected) {
+        assertEquals(OHLCPlugInView.parseInterval(str), expected);
+    }
+
     /*
     private static Long makeWindowStartTime(Long timestamp, Duration interval) {
         long today = getDayStart(timestamp);