diff --git a/src/main/java/TrueFXTickEvent.java b/src/main/java/TrueFXTickEvent.java
index f49ecd3..ea4c8db 100644
--- a/src/main/java/TrueFXTickEvent.java
+++ b/src/main/java/TrueFXTickEvent.java
@@ -1,10 +1,14 @@
 import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
 
 import com.fasterxml.jackson.annotation.JsonFormat;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 
 import org.joda.time.DateTime;
 
+import ats.viz.VizMappable;
+
 /**
  * TrueFXTickEvent holds a single tick read from TrueFX data archive
  * csv file.
@@ -13,7 +17,7 @@ import org.joda.time.DateTime;
  *   EUR/USD,20170102 00:00:00.803,1.0523,1.05307
  */
 @JsonPropertyOrder({ "instrument", "time", "bid", "ask" })
-public class TrueFXTickEvent extends TickEvent {
+public class TrueFXTickEvent extends TickEvent implements VizMappable {
     @JsonFormat(pattern="yyyyMMdd HH:mm:ss.SSS")
     private DateTime time;
     private String instrument;
@@ -97,6 +101,17 @@ public class TrueFXTickEvent extends TickEvent {
         return n.replace('/', '_');
     }
 
+    /**
+     * Return a map of property names to object values of the
+     * properties that should be included in the visualization log.
+     */
+    public Map<String,Object> toVizPropertyMap() {
+        Map<String,Object> map = new HashMap<String,Object>();
+        map.put("time", time);
+        map.put("mid", getMid());
+        return map;
+    }
+
     /**
      * Return a human readable representation of this event.
      */
diff --git a/src/main/java/ats/plugin/OHLCEvent.java b/src/main/java/ats/plugin/OHLCEvent.java
index 99ed6f8..4863a59 100644
--- a/src/main/java/ats/plugin/OHLCEvent.java
+++ b/src/main/java/ats/plugin/OHLCEvent.java
@@ -1,11 +1,17 @@
 package ats.plugin;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import org.joda.time.DateTime;
 
+import ats.viz.VizMappable;
+
+
 /**
  * OHLCEvent stores one bar of OHLC info.
  */
-public class OHLCEvent {
+public class OHLCEvent implements VizMappable {
     private DateTime time;
     private double open;
     private double high;
@@ -38,6 +44,20 @@ public class OHLCEvent {
 
     public Double getClose() { return close; }
 
+    /**
+     * Return a map of property names to object values of the
+     * properties that should be included in the visualization log.
+     */
+    public Map<String,Object> toVizPropertyMap() {
+        Map<String,Object> map = new HashMap<String,Object>();
+        map.put("time", time);
+        map.put("open", open);
+        map.put("high", high);
+        map.put("low", low);
+        map.put("close", close);
+        return map;
+    }
+
     /**
      * Return a human readable representation of this event.
      */