Daily Alpha Brief — 2026-10-18 — SIDEWAYS regime across majors

Bayesian crypto brief for 2026-10-18: SIDEWAYS regime, strategy performance, weight shifts, and quant-vs-crowd sentiment across 9 symbols.

TL;DR

• Dominant regime: SIDEWAYS (3 bullish / 1 bearish of 9 symbols).
• Top signal: ema_cross on BNB raised 0.232 (0.29 → 0.52).
• Shadow portfolio: $724 (-27.65%), 1 open, 35% win rate.

Shadow portfolio value since inception (dashed line = $1,000 starting capital).

Current Bayesian reliability weights, averaged across the universe.

Detected regime per symbol (EMA200 + ADX); % = lead-strategy conviction.

🌐 Market Indices

Crowd reads neutral at 49/100; BTC dominance 60.0% signals balanced.

🌐 Market Overview

Economic (FRED):

Stablecoin dominance 9.3% (risk-on); yield curve regime Flat.

Funding Rates (contrarian — heavy positive = crowded longs to fade):

Economic Calendar: Next FOMC: in 10 days | Next CPI: in 26 days | position-size modifier 1.00×.

📊 Regime Analysis

Regime per symbol from EMA200 + ADX on daily candles, with the fusion signal.

The book is broadly bullish: 3 BULL / 1 BEAR of 9 symbols.

🔗 Correlation Signals

Stable pairs (r > 0.70): SOL/XRP: r=0.94 ✅ | SOL/XRP: r=0.94 ✅ | WIF/SUI: r=0.91 ✅ | SOL/SUI: r=0.91 ✅ | XRP/SUI: r=0.91 ✅ | ETH/SOL: r=0.90 ✅

Index signals: BTC dominance NEUTRAL → no rotation; Fear & Greed contrarian NONE.

⚙️ Strategy Performance

Aggregate 7-day performance per strategy (replayed across the universe). Edge = win-rate × avg P&L per trade — the table is sorted by it.

All P&L figures normalized to a 100 USDT position size for comparability (not summed across symbols).

🧠 Bayesian Weight Shifts

BNB/USDT (BULL):

walk_forward_ema is the standout performer (7d 50% win, Sharpe 9.05, +200 pnl, 14 trades just above the low-sample guard) in a confirmed BULL regime, so it earns a modest lift to 0.70; rsi_macd has adequate trade count but a poor 7d win-rate of 40% with positive pnl, keeping it near neutral with a slight trim. bollinger and volume_spike are both severe underperformers (bollinger 25% win, Sharpe -11.06, -335 pnl; volume_spike 21% win, Sharpe -9.26, -292 pnl), triggering rule 2 cuts to near-floor; ema_cross has a marginally positive 7d Sharpe but a weak 29% win-rate, so it stays below neutral despite BULL regime alignment. tsmom, correlation_strategy, and macro_strategy have zero trades on both windows (rule 1 guard), holding near current weights; sentiment_strategy shows full 7d confluence (100%) but near-zero composite sentiment, warranting a small lift toward 0.55 for its reliable source coverage while avoiding an aggressive move on a flat signal. post_shock_reversal is a mean-reversion strategy in a BULL regime with a sub-35% win-rate, so it is nudged modestly down from its current 0.453.

WIF/USDT (SIDEWAYS):

post_shock_reversal is the clearest case: 0% win rate across 8 trades with a deeply negative 7d Sharpe of -13.86 and -360 pnl — both rules 2 and 3 fire hard, cutting it to the floor at 0.05. bollinger, the canonical SIDEWAYS favourite, paradoxically shows 33% win rate and a -2.69 Sharpe on 7d, so despite regime alignment the data wins (rule 6) and I trim it further to 0.20. rsi_macd earns a modest raise to 0.68 on its strong 7d metrics (80% win, positive Sharpe, +254 pnl) despite only 5 trades nudging the low-sample guard, while volume_spike’s 7d 28% win rate (rule 2 borderline) offsets its positive pnl, keeping it near current. sentiment_strategy is nudged down slightly to 0.50 given only 2 sources and near-zero composite signal offering little directional conviction; tsmom, correlation_strategy, and macro_strategy hold close to current weights due to zero trades or zero signal.

SUI/USDT (SIDEWAYS):

In a SIDEWAYS regime the dominant driver is that ema_cross and walk_forward_ema both show exceptional 7d Sharpe (8.69) and positive pnl (+520.89) despite being momentum strategies — the data overrides the regime prior per rule 6, so they are held high (0.72). rsi_macd has a strong 7d Sharpe (6.47) but only 40% win-rate with no 24h activity, so it is modestly trimmed from 0.706 to 0.62. bollinger is supposed to be the SIDEWAYS beneficiary but posts a 35% 7d win-rate and negative 24h Sharpe, disqualifying a regime boost and warranting a cut to 0.45 per rules 2-3. volume_spike has a negative 7d Sharpe and losing 7d pnl (-19.96) despite a flashy 24h number, so it is held near its low current weight per rule 3. post_shock_reversal has a negative 7d Sharpe (-0.47) and negative pnl, trimmed slightly; tsmom has zero trades (rule 1 low-sample guard), held near current. sentiment_strategy shows sparse coverage (2 sources) and near-zero composite with only moderate confluence, so it is held close to neutral. correlation_strategy and macro_strategy have no active signals and are held near their current low weights.

📡 Signal Outlook

💼 Shadow Portfolio

Open positions:

$1,000 USDT paper portfolio, 1% risk/trade, MEXC fees modelled. No real capital is deployed.

📡 Discourse Radar

Crowd-vs-quant sentiment from CryptoCompare news, crypto RSS, the macro feeds (FT / Fed / CNBC), and the Fear & Greed index. (Reddit retired — Responsible Builder Policy restrictions, 2026.)

• Fear & Greed: +0.00 (neutral crowd).
• Macro signal (FT/Fed/CNBC): -0.01 (neutral) — “IMF warns bond yields could see a ‘disorderly’ spike as debt, inflation risks worsen”.

Most-talked alt: XRP/USDT at +0.12 (bullish crowd lean).

📰 Today’s Key Reads

Curated from 3 sources monitored today:

🟢 DeFi Development boosts CHAD dividend to 14% amid push to grow Solana holdings — theblock — Score: +0.48

🟢 XRP has failed to make holders rich like bitcoin and ether. Here’s why — coindesk — Score: +0.42

🟢 Ripple Prime adds RWA swaps referencing perpetual futures listed on Hyperliquid — theblock — Score: +0.27

⚪ Quantum Alliance forms amid warnings 6.4 million bitcoin face future quantum threat — coindesk — Score: -0.19

⚠️ Williams says Fed may not have to hike rates in 2027, at odds with traders — cnbc_finance — Score: +0.16

Academic Footnote

Tzouvanas et al. (2020) — moving-average trading rules for Bitcoin.

Disclaimer

This is algorithmic analysis only, not financial advice.