Scan M15/H1/D1/W1 only; grade symbols + legend on all messages

- SCAN_TIMEFRAMES: drop H4, add W1 (4 unique TFs → fewer API calls)
- Confirmations updated to use only the 4 scan TFs (no H4 dependency)
- Add _grade_symbol(): 🔥A+ ✅A 👍B ⚠️C 📉D ❌F
- _GRADE_LEGEND shown on every /signal and /scan message
- 🧠 icon on Signal Analysis and Scan Complete headers
- /help grade guide updated with full symbol legend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

telegram_bot.py

@@ -40,22 +40,24 @@ logger = logging.getLogger(__name__)
 
 # ── Config ──────────────────────────────────────────────────────────
 
-SCAN_TIMEFRAMES = ["M15", "H1", "H4", "D1"]
+SCAN_TIMEFRAMES = ["M15", "H1", "D1", "W1"]
 
 _TF_MAP = {
     "M5":  Timeframe.M5,  "M15": Timeframe.M15,
     "M30": Timeframe.M30, "H1":  Timeframe.H1,
     "H4":  Timeframe.H4,  "D1":  Timeframe.D1,
+    "W1":  Timeframe.W1,
 }
 
 _TF_CONFIRMATIONS = {
-    "M15": [Timeframe.M5,  Timeframe.H1],
+    "M15": [Timeframe.H1,  Timeframe.D1],
-    "H1":  [Timeframe.M15, Timeframe.H4],
+    "H1":  [Timeframe.M15, Timeframe.D1],
-    "H4":  [Timeframe.H1,  Timeframe.D1],
+    "D1":  [Timeframe.H1,  Timeframe.W1],
-    "D1":  [Timeframe.H4,  Timeframe.W1],
+    "W1":  [Timeframe.D1],
 }
 
 _GRADE_RANK      = {"A+": 0, "A": 1, "B": 2, "C": 3, "D": 4, "F": 5}
+_GRADE_LEGEND    = "Grade scale: 🔥 A+ · ✅ A · 👍 B · ⚠️ C · 📉 D · ❌ F"
 _EST             = ZoneInfo("America/New_York")
 
 # ── Formatting helpers ──────────────────────────────────────────────
@@ -75,6 +77,10 @@ def _signal_action(signal: SignalStrength) -> str:
     }.get(signal, "NEUTRAL")
 
 
+def _grade_symbol(quality: str) -> str:
+    return {"A+": "🔥", "A": "✅", "B": "👍", "C": "⚠️", "D": "📉"}.get(quality, "❌")
+
+
 def _indicator_condition(ind) -> str:
     desc = ind.description
     if " — " in desc:
@@ -114,8 +120,9 @@ def _build_combined_signal(
     MTF detail block (folded to one line), news unless non-neutral.
     """
     lines: List[str] = []
-    lines.append(f"🌐 <b>{_h(display)} — Signal Analysis</b>")
+    lines.append(f"🌐 🧠 <b>{_h(display)} — Signal Analysis</b>")
     lines.append(f"🕐 {now_str}")
+    lines.append(f"<i>{_GRADE_LEGEND}</i>")
 
     for tf in SCAN_TIMEFRAMES:
         reports = results_by_tf.get(tf, [])
@@ -137,10 +144,11 @@ def _build_combined_signal(
             continue
 
         action = _signal_action(r.final_signal)
+        sym    = _grade_symbol(r.signal_quality)
 
         lines.append("")
         lines.append("────────────────────────")
-        lines.append(f"<b>{tf} · {action} · Grade {_h(r.signal_quality)}</b>")
+        lines.append(f"{sym} <b>{tf} · {action} · Grade {_h(r.signal_quality)}</b>")
         lines.append("")
 
         # ── Trade setup (always kept intact) ─────────────────────────
@@ -207,15 +215,17 @@ def _build_scan_message(
     Full entry/TP/SL preserved; no indicator list (use /signal to drill in).
     """
     lines: List[str] = []
-    lines.append(f"📊 <b>Scan Complete</b> · {now_str}")
+    lines.append(f"📊 🧠 <b>Scan Complete</b> · {now_str}")
     lines.append(f"Timeframes: <code>{_h(tfs_str)}</code> | Best signal per pair")
+    lines.append(f"<i>{_GRADE_LEGEND}</i>")
     lines.append("")
 
     for tf, r in actionable:
         action = _signal_action(r.final_signal)
+        sym    = _grade_symbol(r.signal_quality)
 
         lines.append(
-            f"<b>{_h(r.display_name)} · {action}</b>"
+            f"{sym} <b>{_h(r.display_name)} · {action}</b>"
             f" · {_h(r.signal_quality)} · {tf}"
         )
 
@@ -325,9 +335,12 @@ class ForexTelegramBot:
             "  /help          — This message\n\n"
             f"<b>Timeframes analyzed:</b> <code>{tfs}</code>\n\n"
             "<b>Signal Grades:</b>\n"
-            "  A / A+ — High confidence, consider entry\n"
+            "  🔥 A+ — Strongest signal, MTF aligned, high confidence\n"
-            "  B      — Decent setup, wait for confirmation\n"
+            "  ✅ A  — Strong signal, MTF aligned\n"
-            "  C / D  — Low confidence, watch only\n\n"
+            "  👍 B  — Decent setup, wait for confirmation\n"
+            "  ⚠️ C  — Weak signal, watch only\n"
+            "  📉 D  — Very weak, no action\n"
+            "  ❌ F  — No clear signal\n\n"
             "<i>⚠️ Educational use only. Not financial advice.</i>"
         )
         await update.message.reply_text(text, parse_mode=ParseMode.HTML)