diff --git a/jsplot/src/main/java/tech/tablesaw/plotly/api/PricePlot.java b/jsplot/src/main/java/tech/tablesaw/plotly/api/PricePlot.java
index b0f11efa3..be604922b 100644
--- a/jsplot/src/main/java/tech/tablesaw/plotly/api/PricePlot.java
+++ b/jsplot/src/main/java/tech/tablesaw/plotly/api/PricePlot.java
@@ -27,17 +27,17 @@ public static Figure create(
     NumericColumn<?> low = table.numberColumn(lowCol);
     NumericColumn<?> close = table.numberColumn(closeCol);
     ScatterTrace trace;
-    if (x.type() == ColumnType.LOCAL_DATE) {
+    if (ColumnType.LOCAL_DATE.equals(x.type())) {
       trace =
           ScatterTrace.builder(table.dateColumn(xCol), open, high, low, close)
               .type(plotType)
               .build();
-    } else if (x.type() == ColumnType.LOCAL_DATE_TIME) {
+    } else if (ColumnType.LOCAL_DATE_TIME.equals(x.type())) {
       trace =
           ScatterTrace.builder(table.dateTimeColumn(xCol), open, high, low, close)
               .type(plotType)
               .build();
-    } else if (x.type() == ColumnType.INSTANT) {
+    } else if (ColumnType.INSTANT.equals(x.type())) {
       trace =
           ScatterTrace.builder(table.instantColumn(xCol), open, high, low, close)
               .type(plotType)
diff --git a/jsplot/src/test/java/tech/tablesaw/plotly/OchlTest.java b/jsplot/src/test/java/tech/tablesaw/plotly/OchlTest.java
new file mode 100644
index 000000000..4f39011ea
--- /dev/null
+++ b/jsplot/src/test/java/tech/tablesaw/plotly/OchlTest.java
@@ -0,0 +1,47 @@
+package tech.tablesaw.plotly;
+
+import org.junit.jupiter.api.Test;
+import tech.tablesaw.api.DateTimeColumn;
+import tech.tablesaw.api.DoubleColumn;
+import tech.tablesaw.api.Table;
+import tech.tablesaw.plotly.api.OHLCPlot;
+import tech.tablesaw.plotly.components.Figure;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+public class OchlTest {
+
+    @Test
+    void ochlPlotDoesNotThrowIllegalArgumentException() {
+        // Test to fix bug reported at https://github.com/jtablesaw/tablesaw/issues/1237
+        String timeTitle = "time";
+        String openTitle = "open";
+        String closeTitle = "close";
+        String highTitle = "high";
+        String lowTitle = "low";
+        String graphTitle = "title";
+
+        LocalDateTime now = LocalDateTime.now();
+        List<LocalDateTime> time = List.of(now, now.plusSeconds(5), now.plusSeconds(10));
+        List<Double> open = List.of(1d, 2d, 3d);
+        List<Double> close = List.of(1d, 2d, 3d);
+        List<Double> high = List.of(1d, 2d, 3d);
+        List<Double> low = List.of(1d, 2d, 3d);
+
+        DateTimeColumn timeColumn = DateTimeColumn.create(timeTitle, time);
+        DoubleColumn openColumn = DoubleColumn.create(openTitle, open);
+        DoubleColumn closeColumn = DoubleColumn.create(closeTitle, close);
+        DoubleColumn highColumn = DoubleColumn.create(highTitle, high);
+        DoubleColumn lowColumn = DoubleColumn.create(lowTitle, low);
+
+        Table priceTable = Table.create(timeColumn, openColumn, closeColumn, highColumn, lowColumn);
+        Figure figure = OHLCPlot.create(graphTitle, priceTable, timeTitle, openTitle, highTitle, lowTitle, closeTitle);
+
+        assertNotNull(figure);
+        assertDoesNotThrow(() -> IllegalArgumentException.class);
+    }
+}