diff --git a/backend/services/wavelet_signals.py b/backend/services/wavelet_signals.py
index 2afac08..690e6f1 100644
--- a/backend/services/wavelet_signals.py
+++ b/backend/services/wavelet_signals.py
@@ -20,8 +20,11 @@ chat context always has fresh slope/energy/ridge state, not just firing
 events (see ai_chat_context.py:_block_wavelet_signals).
 """
 import json
+import logging
 from typing import Dict, List, Optional
 
+logger = logging.getLogger(__name__)
+
 
 def _compute_slope(series: List[float]) -> List[float]:
     n = len(series)
@@ -249,11 +252,18 @@ def _fetch_close_series(ticker: str, saxo_symbol: Optional[str]):
             bars = get_price_history(saxo_symbol, asset_type, days=400)
             return [b["close"] for b in bars], [b["date"] for b in bars]
         except Exception as e:
-            import logging
-            logging.getLogger(__name__).warning(f"[wavelet_signals] Saxo fetch failed for '{saxo_symbol}', falling back to yfinance: {e}")
+            logger.warning(f"[wavelet_signals] Saxo fetch failed for '{saxo_symbol}', falling back to yfinance: {e}")
 
     from services.data_fetcher import get_historical
-    hist = get_historical(ticker, period="1y", interval="1d")
+    yf_ticker = ticker.upper()
+    # Bare 6-letter FX pairs (EURUSD, GBPUSD...) are a common Watchlist ticker convention
+    # here but not a real yfinance symbol (needs the "=X" suffix) — without this, any
+    # Saxo-linked FX pair whose Saxo fetch fails falls through to a yfinance call that's
+    # guaranteed to return nothing, permanently keeping it out of the wavelet cache no
+    # matter how many refreshes run.
+    if len(yf_ticker) == 6 and yf_ticker.isalpha():
+        yf_ticker += "=X"
+    hist = get_historical(yf_ticker, period="1y", interval="1d")
     return [h["close"] for h in hist], [h["date"] for h in hist]
 
 
@@ -299,6 +309,10 @@ def scan_watchlist_wavelet_signals(run_id: Optional[str] = None) -> List[Dict]:
         try:
             values, dates = _fetch_close_series(ticker, item.get("saxo_quote_symbol"))
             if len(values) < lookback + 32:
+                logger.warning(
+                    f"[wavelet_signals] Skipping '{ticker}': only {len(values)} price points "
+                    f"fetched, need >= {lookback + 32} (lookback={lookback}) — no cache written this pass."
+                )
                 continue
             start_idx = max(lookback, len(values) - 60)
             decomposed = decomposer(
@@ -307,6 +321,7 @@ def scan_watchlist_wavelet_signals(run_id: Optional[str] = None) -> List[Dict]:
                 num_levels=num_levels, wavelet=wavelet, step=1,
             )
             if not decomposed["dates"]:
+                logger.warning(f"[wavelet_signals] Skipping '{ticker}': decomposition produced no output dates — no cache written this pass.")
                 continue
             save_wavelet_decomposition_cache(ticker, run_id, method, wavelet, num_levels, lookback, decomposed)
             price_at_signal = decomposed["original"][-1]
@@ -399,8 +414,9 @@ def scan_watchlist_wavelet_signals(run_id: Optional[str] = None) -> List[Dict]:
                         "ridge_period_days": ridge_series[-1],
                         "params_json": json.dumps(ridge_params) if ridge_params else None,
                     })
-        except Exception:
-            continue  # one bad ticker must not abort the whole scan
+        except Exception as e:
+            logger.warning(f"[wavelet_signals] Skipping '{ticker}': {e}")  # one bad ticker must not abort the whole scan
+            continue
 
     return results
 
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 36ba805..889b055 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -140,8 +140,15 @@ function NormalRoutes() {
   const location = useLocation()
   if (KEEP_ALIVE_PATHS.has(location.pathname)) return null
 
-  // On instrument paths the keep-alive layer renders the UI; this Routes just registers the tab
-  const isInstrument = /^\/instruments\/\w/.test(location.pathname)
+  // On instrument paths the keep-alive layer renders the UI; this Routes just registers the tab.
+  // Was `/^\/instruments\/\w/` (required a word char right after the slash) — encoded ids
+  // that start with a character encodeURIComponent escapes (^GSPC -> %5EGSPC) begin with
+  // "%", which isn't \w, so this evaluated false for that tab. isInstrument then picked
+  // 'flex-1 overflow-auto' instead of 'hidden' for this otherwise-empty div, and — since
+  // InstrumentKeepAlive's own div is ALSO flex-1 in the same flex column — the two split
+  // the available height roughly 50/50 instead of the instrument page getting all of it,
+  // which is exactly the "page only fills half the screen" symptom.
+  const isInstrument = location.pathname.startsWith('/instruments/')
 
   return (
     <div className={isInstrument ? 'hidden' : 'flex-1 overflow-auto'}>
diff --git a/frontend/src/components/layout/TabBar.tsx b/frontend/src/components/layout/TabBar.tsx
index c91d6d7..7413e48 100644
--- a/frontend/src/components/layout/TabBar.tsx
+++ b/frontend/src/components/layout/TabBar.tsx
@@ -69,7 +69,13 @@ export default function TabBar() {
         {/* Dynamic instrument tabs */}
         {instrumentIds.map(id => {
           const path = `/instruments/${id}`
-          const isActive = activePath.toLowerCase() === path.toLowerCase()
+          // activePath keeps its percent-encoding (EURUSD=X -> /instruments/EURUSD%3DX)
+          // while `id` is already decoded — same mismatch fixed in App.tsx's
+          // InstrumentKeepAlive, needed again here or this tab never lights up as active
+          // for any id containing a character encodeURIComponent escapes ("=").
+          let decodedActivePath = activePath
+          try { decodedActivePath = decodeURIComponent(activePath) } catch { /* malformed sequence, compare as-is */ }
+          const isActive = decodedActivePath.toLowerCase() === path.toLowerCase()
           return (
             <button
               key={id}