diff --git a/src/main/java/org/qortal/api/websocket/PresenceWebSocket.java b/src/main/java/org/qortal/api/websocket/PresenceWebSocket.java
index 26d131c4..c579ac86 100644
--- a/src/main/java/org/qortal/api/websocket/PresenceWebSocket.java
+++ b/src/main/java/org/qortal/api/websocket/PresenceWebSocket.java
@@ -20,6 +20,7 @@ import org.eclipse.jetty.websocket.api.annotations.OnWebSocketMessage;
 import org.eclipse.jetty.websocket.api.annotations.WebSocket;
 import org.eclipse.jetty.websocket.servlet.WebSocketServletFactory;
 import org.qortal.controller.Controller;
+import org.qortal.controller.Synchronizer;
 import org.qortal.crypto.Crypto;
 import org.qortal.data.transaction.PresenceTransactionData;
 import org.qortal.data.transaction.TransactionData;
@@ -99,13 +100,13 @@ public class PresenceWebSocket extends ApiWebSocket implements Listener {
 
 	@Override
 	public void listen(Event event) {
-		// We use NewBlockEvent as a proxy for 1-minute timer
-		if (!(event instanceof Controller.NewTransactionEvent) && !(event instanceof Controller.NewBlockEvent))
+		// We use Synchronizer.NewChainTipEvent as a proxy for 1-minute timer
+		if (!(event instanceof Controller.NewTransactionEvent) && !(event instanceof Synchronizer.NewChainTipEvent))
 			return;
 
 		removeOldEntries();
 
-		if (event instanceof Controller.NewBlockEvent)
+		if (event instanceof Synchronizer.NewChainTipEvent)
 			// We only wanted a chance to cull old entries
 			return;
 
diff --git a/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java b/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java
index 186f79e3..35fc4691 100644
--- a/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java
+++ b/src/main/java/org/qortal/api/websocket/TradeOffersWebSocket.java
@@ -23,6 +23,7 @@ import org.eclipse.jetty.websocket.api.annotations.WebSocket;
 import org.eclipse.jetty.websocket.servlet.WebSocketServletFactory;
 import org.qortal.api.model.CrossChainOfferSummary;
 import org.qortal.controller.Controller;
+import org.qortal.controller.Synchronizer;
 import org.qortal.crosschain.SupportedBlockchain;
 import org.qortal.crosschain.ACCT;
 import org.qortal.crosschain.AcctMode;
@@ -80,10 +81,10 @@ public class TradeOffersWebSocket extends ApiWebSocket implements Listener {
 
 	@Override
 	public void listen(Event event) {
-		if (!(event instanceof Controller.NewBlockEvent))
+		if (!(event instanceof Synchronizer.NewChainTipEvent))
 			return;
 
-		BlockData blockData = ((Controller.NewBlockEvent) event).getBlockData();
+		BlockData blockData = ((Synchronizer.NewChainTipEvent) event).getNewChainTip();
 
 		// Process any new info
 
diff --git a/src/main/java/org/qortal/controller/Synchronizer.java b/src/main/java/org/qortal/controller/Synchronizer.java
index b98c5fa2..bb36d42d 100644
--- a/src/main/java/org/qortal/controller/Synchronizer.java
+++ b/src/main/java/org/qortal/controller/Synchronizer.java
@@ -22,6 +22,8 @@ import org.qortal.data.block.CommonBlockData;
 import org.qortal.data.network.PeerChainTipData;
 import org.qortal.data.transaction.RewardShareTransactionData;
 import org.qortal.data.transaction.TransactionData;
+import org.qortal.event.Event;
+import org.qortal.event.EventBus;
 import org.qortal.network.Network;
 import org.qortal.network.Peer;
 import org.qortal.network.message.BlockMessage;
@@ -96,6 +98,24 @@ public class Synchronizer extends Thread {
 		OK, NOTHING_TO_DO, GENESIS_ONLY, NO_COMMON_BLOCK, TOO_DIVERGENT, NO_REPLY, INFERIOR_CHAIN, INVALID_DATA, NO_BLOCKCHAIN_LOCK, REPOSITORY_ISSUE, SHUTTING_DOWN;
 	}
 
+	public static class NewChainTipEvent implements Event {
+		private final BlockData priorChainTip;
+		private final BlockData newChainTip;
+
+		public NewChainTipEvent(BlockData priorChainTip, BlockData newChainTip) {
+			this.priorChainTip = priorChainTip;
+			this.newChainTip = newChainTip;
+		}
+
+		public BlockData getPriorChainTip() {
+			return this.priorChainTip;
+		}
+
+		public BlockData getNewChainTip() {
+			return this.newChainTip;
+		}
+	}
+
 	// Constructors
 
 	private Synchronizer() {
@@ -338,6 +358,8 @@ public class Synchronizer extends Thread {
 
 				Network network = Network.getInstance();
 				network.broadcast(broadcastPeer -> network.buildHeightMessage(broadcastPeer, newChainTip));
+
+				EventBus.INSTANCE.notify(new NewChainTipEvent(priorChainTip, newChainTip));
 			}
 
 			return syncResult;
diff --git a/src/main/java/org/qortal/controller/tradebot/TradeBot.java b/src/main/java/org/qortal/controller/tradebot/TradeBot.java
index 2f9c3121..6996acbb 100644
--- a/src/main/java/org/qortal/controller/tradebot/TradeBot.java
+++ b/src/main/java/org/qortal/controller/tradebot/TradeBot.java
@@ -16,6 +16,7 @@ import org.bitcoinj.core.ECKey;
 import org.qortal.account.PrivateKeyAccount;
 import org.qortal.api.model.crosschain.TradeBotCreateRequest;
 import org.qortal.controller.Controller;
+import org.qortal.controller.Synchronizer;
 import org.qortal.controller.tradebot.AcctTradeBot.ResponseResult;
 import org.qortal.crosschain.*;
 import org.qortal.data.at.ATData;
@@ -213,7 +214,7 @@ public class TradeBot implements Listener {
 
 	@Override
 	public void listen(Event event) {
-		if (!(event instanceof Controller.NewBlockEvent))
+		if (!(event instanceof Synchronizer.NewChainTipEvent))
 			return;
 
 		synchronized (this) {