diff --git a/src/main/java/ats/plugin/OHLCPlugInViewFactory.java b/src/main/java/ats/plugin/OHLCPlugInViewFactory.java
index 8aa3001..004a831 100644
--- a/src/main/java/ats/plugin/OHLCPlugInViewFactory.java
+++ b/src/main/java/ats/plugin/OHLCPlugInViewFactory.java
@@ -67,21 +67,23 @@ public class OHLCPlugInViewFactory extends ViewFactorySupport {
         value = validatedNodes[4];
 
         Class calcTypeClass = calcType.getForge().getEvaluationType();
-        if ((calcTypeClass != String.class))
+        if (calcTypeClass != String.class)
         {
             throw new ViewParameterException("OHLC view needs a String-typed calc type value for parameter 1");
         }
 
         Class timeTypeClass = timeType.getForge().getEvaluationType();
-        if ((timeTypeClass != String.class))
+        if (timeTypeClass != String.class)
         {
             throw new ViewParameterException("OHLC view needs a String-typed time type value for parameter 2");
         }
 
         Class intervalClass = interval.getForge().getEvaluationType();
-        if ((intervalClass != String.class))
+        if ((intervalClass != String.class) &&
+            (intervalClass != Integer.class) &&
+            (intervalClass != int.class))
         {
-            throw new ViewParameterException("OHLC view needs String-typed interval value for parameter 3");
+            throw new ViewParameterException("OHLC view needs String- or integer-typed interval value for parameter 3 - got " + intervalClass);
         }
 
         Class timestampClass = timestamp.getForge().getEvaluationType();