Daily Alpha Brief — 2026-10-17 — SIDEWAYS regime across majors

Bayesian crypto brief for 2026-10-17: SIDEWAYS regime, strategy performance, weight shifts, and quant-vs-crowd sentiment across 9 symbols.

TL;DR

• Dominant regime: SIDEWAYS (2 bullish / 1 bearish of 9 symbols).
• Top signal: bollinger on SUI raised 0.326 (0.32 → 0.65).
• Shadow portfolio: $727 (-27.28%), 2 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 59.9% 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 11 days | Next CPI: in 27 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: 2 BULL / 1 BEAR of 9 symbols.

🔗 Correlation Signals

Stable pairs (r > 0.70): SOL/XRP: r=0.94 ✅ | BTC/ETH: r=0.90 ✅ | ETH/SOL: r=0.90 ✅ | SOL/BNB: r=0.89 ✅ | XRP/SUI: r=0.89 ✅ | BTC/BNB: r=0.89 ✅

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

SUI/USDT (SIDEWAYS):

volume_spike (7d win 31%, Sharpe -3.33, pnl -294.81) and post_shock_reversal (7d win 31%, Sharpe -4.14, pnl -378.69) both breach rule 2 and 3 with persistent negative pnl and sub-30% win rates, so they are cut hard toward 0.10; the SIDEWAYS regime further penalises volume_spike’s noisy breakout bias and post_shock_reversal’s mean-reversion timing has clearly failed here. ema_cross and walk_forward_ema show strong 7d Sharpe (9.40 and 8.20) with positive pnl (+570 and +488), earning raises under rule 4 despite the SIDEWAYS regime that normally disfavours momentum — the data overrides the regime prior per rule 6, though their very high current weights (0.83) are trimmed slightly for smoothness. rsi_macd is reduced from 0.777 because its 7d win rate of 38% is below 50% and well short of the rule-4 threshold, despite its high Sharpe, in a SIDEWAYS market where its momentum bias is a liability. sentiment_strategy has only 2 sources with a near-neutral composite (+0.01) and is nudged down to neutral 0.50; correlation_strategy and macro_strategy both report zero activity and are held within ±0.05 of their current weights per rule 1.

AVAX/USDT (SIDEWAYS):

ema_cross and walk_forward_ema are both crushed on 7d (20%/19% win-rate, Sharpe -9.01/-8.62, deep negative pnl), triggering rule 2 hard cuts toward the floor despite SIDEWAYS already disfavouring momentum — data wins over regime; post_shock_reversal similarly fires rule 2 (29% win, Sharpe -5.15, -435 pnl) and is cut to near-floor. volume_spike is the standout: 87 trades, 38% win-rate is modest but a 7d Sharpe of 4.67 with +356 pnl is exceptional, earning a boost to 0.65 reinforced by the SIDEWAYS regime bump. bollinger’s 7d is weak (35% win, Sharpe 0.22, near-zero pnl) despite a strong 24h, so only a tiny regime-alignment nudge is warranted; rsi_macd has a conflicted picture (poor 24h but positive 7d Sharpe/pnl at 54 trades), warranting a modest cut from its SIDEWAYS misalignment; tsmom and correlation_strategy have zero trades and are held near current weights per rule 1; sentiment_strategy holds steady given only 2 sources and near-zero composite signal.

BTC/USDT (SIDEWAYS):

rsi_macd is cut hard on persistent underperformance: 7d win-rate 31% with Sharpe -3.76 and negative pnl triggers rules 2-3, and SIDEWAYS disfavours momentum anyway. walk_forward_ema is similarly punished — 7d win-rate 18%, Sharpe -4.93, pnl -102.50 — both windows deeply negative, so it is reduced toward the floor (rule 2-3, conflict rule). tsmom has only 17 7d trades (borderline rule 1) but both its win-rate (29%) and Sharpe (-2.33) are negative on 7d, confirming the cut; it stays near its already-low current weight. ema_cross and bollinger retain moderate support: ema_cross has a strong 7d Sharpe (3.60) despite poor 24h, and bollinger’s positive 7d Sharpe (1.72) and pnl align with SIDEWAYS regime, though 7d win-rate below 55% limits the boost; volume_spike is trimmed on negative 7d Sharpe and pnl, partially offset by a small SIDEWAYS nudge; post_shock_reversal holds near neutral on decent 7d Sharpe (1.42) and positive pnl as a mean-reversion strategy suited to SIDEWAYS; sentiment holds with moderate confluence (67% 7d) and near-zero composite consistent with SIDEWAYS indecision; correlation and macro stay near their current weights as they report no active signals.

📡 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): -0.02 (neutral) — “IMF warns bond yields could see a ‘disorderly’ spike as debt, inflation risks worsen”.

Most-talked alt: XRP/USDT at +0.10 (bullish crowd lean).

📰 Today’s Key Reads

Curated from 3 sources monitored today:

🟢 Major shareholder presses SkyAI on Solana sales after treasury shrinks 70% in a month — theblock — Score: +0.47

🔴 Capital B posts wider H1 net loss of $78 million on bitcoin impairment charge — theblock — Score: -0.43

🟢 XRP has failed to make holders rich like bitcoin and ether. Here’s why — coindesk — Score: +0.21

⚪ Quantum Alliance forms amid warnings 6.4 million bitcoin face future quantum threat — coindesk — Score: -0.13

⚠️ Williams says Fed may not have to hike rates in 2027, at odds with traders — cnbc_finance — Score: +0.12

Academic Footnote

Miralles-Quirós (2022) — post-shock reversals in digital assets.

Disclaimer

This is algorithmic analysis only, not financial advice.