diff --git a/Experts/JsonAPI.mq5 b/Experts/JsonAPI.mq5
index b252374..f84533f 100644
Binary files a/Experts/JsonAPI.mq5 and b/Experts/JsonAPI.mq5 differ
diff --git a/Include/TestJsonAPI.mqh b/Include/TestJsonAPI.mqh
new file mode 100644
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diff --git a/changelog.md b/changelog.md
index ac6c018..17d284e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -5,3 +5,4 @@
 - add support for direct download as CSV files
 - add one automatic retry binding to sockets. When running under Wine in Linux, sockets will be blocked for 60 seconds if closed uncleanly. This can happen if the client is still connected while the EA gets reloaded.
 - skip re-initialization on chart timeframe change
+- add testing mode with fake tick data