Remove chart from /signal, explain score bar, and optimize API calls to run concurrently

main.py

@@ -196,10 +196,18 @@ async def chart_cmd(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
 async def signal_cmd(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
     try:
         pair, tf = _parse_pair_tf(ctx.args)
-        df = await fetch_ohlc(pair, tf)
-
         htf = HTF_OF.get(tf)
-        htf_df = await fetch_ohlc(pair, htf) if htf and htf != tf else None
+        
+        # Fetch both timeframes concurrently to double the network speed
+        import asyncio
+        if htf and htf != tf:
+            df, htf_df = await asyncio.gather(
+                fetch_ohlc(pair, tf),
+                fetch_ohlc(pair, htf)
+            )
+        else:
+            df = await fetch_ohlc(pair, tf)
+            htf_df = None
 
         report = analyze(df, htf_df)
         price   = report["price"]
@@ -221,12 +229,12 @@ async def signal_cmd(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
             "",
             *_fmt_group(report["readings"], "volatility", "*-- VOLATILITY*"),
             "",
-            # Score line — bar + plain-English label so the number has context
+            "*-- FINAL VERDICT --*",
             f"`[{_score_bar(report['score'], report['max_score'])}]`  "
             f"{ascii_indicator(verdict)} *{verdict}*",
-            f"Score `{report['score']:+d}` of +/-`{report['max_score']}` "
+            f"Score `{report['score']:+d}` of maximum +/-`{report['max_score']}`",
-            f"({_score_label(report['score'], report['max_score'])} signal,  "
+            f"_{report['confidence']}% overall strength ({_score_label(report['score'], report['max_score'])} signal)_",
-            f"{report['confidence']}% of max)",
+            "> _The bar above visualizes the signal strength. The more # symbols, the stronger the conviction. +20 is maximum Buy, -20 is maximum Sell._",
         ]
 
         if report["context"]:
@@ -249,9 +257,8 @@ async def signal_cmd(update: Update, ctx: ContextTypes.DEFAULT_TYPE) -> None:
                 f"_ATR-based zones:_  SL `{sl}`  |  TP `{tp}`",
             ]
 
-        caption = "\n".join(lines) + DISCLAIMER
+        text = "\n".join(lines) + DISCLAIMER
-        img = generate_chart(df, pair, tf, verdict=verdict, confidence=report["confidence"])
+        await update.message.reply_text(text, parse_mode="Markdown")
-        await update.message.reply_photo(img, caption=caption, parse_mode="Markdown")
     except Exception as e:
         logger.exception("signal_cmd failed")
         await _reply(update, f"Error: {e}")