diff --git a/telegram_bot.py b/telegram_bot.py
index 964cccd..4a60782 100755
--- a/telegram_bot.py
+++ b/telegram_bot.py
@@ -341,7 +341,10 @@ def format_signal_message(report: SignalReport) -> str:
         f"📊 Regime: {regime_str} · Vol: {vol_str}",
     ]
     if report.action_recommendation:
-        lines.append(f"_{_escape_md(report.action_recommendation)}_")
+        # Pattern identifiers use underscores, which legacy Telegram Markdown
+        # can misparse even when escaped inside this italicized action line.
+        action = report.action_recommendation.replace("_", " ")
+        lines.append(f"_{_escape_md(action)}_")
 
     if report.trade_setup and sig not in (SignalStrength.NEUTRAL,):
         ts = report.trade_setup
diff --git a/test_all.py b/test_all.py
index f854353..54b9719 100644
--- a/test_all.py
+++ b/test_all.py
@@ -1685,6 +1685,15 @@ def _():
     assert "Not financial advice" in msg
 
 
+@test("format_signal_message makes chart pattern actions Markdown-safe")
+def _():
+    report = SignalReport(symbol="XAU/USD", display_name="XAU/USD", timestamp="now")
+    report.action_recommendation = "BUY — double_bottom pattern completion"
+    msg = format_signal_message(report)
+    assert "_BUY — double bottom pattern completion_" in msg
+    assert "double_bottom" not in msg
+
+
 @test("format_signal_message renders stamped per-TF trail plan")
 def _():
     def _setup(**extra):