You can use [[TWikiMetaData]] to place a command in [[WebTopicViewTemplate]] and [[WebTopicNonWikiTemplate]] that will show if a topic has moved by searching for the tag %META:TOPICMOVED\{...\}%. Customize something like this:
-> %<nop>METASEARCH{type="topicmoved" web="%WEB%" topic="%TOPIC%" title="This topic used to exist and was moved to: "}%
+> %<nop>METASEARCH{type="topicmoved" web="%WEB%" topic="%TOPIC%"
+> title="This topic used to exist and was moved to: "}%
## <a name="Impact of Topic Access Settings"></a> Impact of Topic Access Settings