FX Engineer: Weekly Brief

Retail FX Positioning: Week of 2026-04-13 (#6)

FX Engineer — Tue, 14 Apr 2026 15:43:28 GMT

Week of 2026-04-13 | Issue #7

A weekly snapshot of where retail traders are positioned across 28 currency pairs, computed from the Speculative Sentiment Index (SSI). No predictions. No recommendations. Pure positioning data with historical context.

The Snapshot

MOST CROWDED SHORT THIS WEEK EURJPY: SSI -5.4058 (15.6% long) Z-48h: -0.77 3rd percentile — more short than 97% of all readings since 2002

MOST CROWDED LONG THIS WEEK GBPCHF: SSI 13.6254 (93.2% long) Z-48h: -0.89 22nd percentile — more long than 22% of all readings since 2002

BIGGEST POSITIONING SHIFT (7 DAYS) GBPCHF: SSI 13.6254 (93.2% long) Shifted -5.44 in 7 days 22nd percentile

Notable Pairs

EURJPY sits at the 3rd percentile with only 15.6% of retail traders positioned long. This is one of the most extreme short readings in the pair since 2002. The crowd has been net short for an extended period, and the current SSI of -5.41 reflects conviction that is rare by historical standards. US CPI on Monday is the immediate catalyst for yen crosses.

GBPJPY is similarly stretched at the 4th percentile (22.7% long, SSI -3.41). The persistent selling in GBP/JPY has driven z-scores negative across all timeframes, with z-4h at -2.76, the most extreme 4-hour reading across all 28 pairs. UK CPI on Tuesday and Retail Sales on Friday provide the catalysts for sterling this week.

AUDJPY registers at the 7th percentile (20.3% long). Across the yen complex, the crowd is uniformly short: CADJPY at the 20th percentile, NZDJPY at the 5th. This broad-based yen-long positioning stands out as the dominant theme.

NZDCAD produced the most dramatic z-score spike this week: z-48h of +3.65, a sharp intraday reversal toward long. The pair sits at the 38th percentile, so the move is not extreme in absolute terms despite the velocity of the shift.

EURUSD stands at its 8th percentile with only 29.5% long. This is among the most one-sided short readings in the pair since 2002, reflecting entrenched bearish retail sentiment heading into a week dominated by inflation data.

Thin-Market Note

Several CHF crosses carry thin-market flags this week. CADCHF (96% long), CHFJPY (2% long), USDCHF (95% long), NZDCHF (96% long) all show SSI ratios exceeding 15:1, indicating single-digit participation on the short side. These readings confirm the directional bias (crowd is long CHF) but the magnitude of the ratios reflects low participation rather than conviction. Synthetic SSI derived from major-pair positioning is used for these crosses in the table above.

Full Positioning Table — All 28 Pairs

† Thin-market pair: SSI ratio exceeds 15:1, likely reflecting single-digit participation on one side. Synthetic SSI from major-pair positioning is used where available.

This Week

US CPI Release — April 14, 2026 (USD)
CPI y/y — April 15, 2026 (GBP)
Unemployment Claims — April 16, 2026 (USD)
Retail Sales m/m — April 17, 2026 (GBP)

Definitions

SSI — The ratio of retail traders holding long positions to those holding short positions on a given currency pair.

Z-Score — A standardized measure of how far current SSI deviates from its recent average, expressed in standard deviations. (Z-48h: Hourly bars, 48-bar lookback; Z-14d: Daily bars, 14-bar lookback)

Percentile — Where the current SSI reading falls relative to all historical readings for that pair since December 2002 (3.4M observations).

7D Shift — The change in raw SSI value over the past 7 calendar days.

Thin Market — A pair where the absolute SSI ratio exceeds 15, indicating that one side of the trade has single-digit participation. Synthetic SSI derived from major-pair positioning is used where available.

FXE Research | fxeresearch.substack.com | Data: SSI, 3.4M observations, 28 pairs, December 2002 to present. Hourly resolution since January 2026. For informational and research purposes only. Not investment advice. Past positioning patterns are not indicative of future price movements.

Retail FX Positioning: Week of 2026-03-30 (#4)

FX Engineer — Tue, 31 Mar 2026 20:35:30 GMT

Week of 2026-03-30 | Issue #4 | Published Every Monday 06:00 UTC

A weekly snapshot of where retail traders are positioned across 28 currency pairs, computed from the FXCM Speculative Sentiment Index (SSI). No predictions. No recommendations. Pure positioning data with historical context.

The Snapshot

🔴 MOST CROWDED SHORT THIS WEEK Pair: EURNZD SSI: -3.4459 | Percentile: 4th | Z: -2.635 SHORT for 762h | At z-extreme for 96h

🟢 MOST CROWDED LONG THIS WEEK Pair: GBPJPY SSI: 1.003 | Percentile: 94th | Z: 4.344 LONG for 1h | At z-extreme for 2h

📊 BIGGEST POSITIONING SHIFT (7 DAYS) Pair: USDCHF SSI: 10.8889 | Percentile: 7th | Z: -1.244 LONG for 778h

Pair in Focus: GBPJPY

GBPJPY just flipped net long for the first time in what appears to have been an extended short stretch — the crowd has held this new direction for just 1 hour. But the magnitude of the move is what stands out: a z-score of 4.344 puts this reading nearly three standard deviations beyond the extreme threshold (1.5), and the 94.5th percentile means GBPJPY hasn’t seen retail this crowded long since the top ~5% of all readings in our dataset going back to March 2014. This isn’t a gradual drift — it’s a sharp, sudden reversal in positioning. Worth watching whether the crowd holds conviction here or snaps back, especially with Non-Farm Payrolls on Friday.

Full Positioning Table -- All 28 Pairs

* Thin-market pair: SSI ratio exceeds 15:1, likely reflecting single-digit participation on one side. Z-scores suppressed (n/a) for these pairs as they are computed on a distribution dominated by thin readings.

One Thing to Watch This Week

THIS WEEK'S EVENT Event: Non-Farm Payrolls | Date: April 03, 2026 Currency: USD | Importance: HIGH

Definitions

FXE Research | fxeresearch.substack.com | Data: FXCM SSI, 1.9M observations, March 2014 to present For informational and research purposes only. Not investment advice. Past positioning patterns are not indicative of future price movements.

Retail FX Positioning: Week of 2026-03-23 (#3)

FX Engineer — Mon, 23 Mar 2026 16:34:23 GMT

Week of 2026-03-23 | Issue #3 | Published Every Monday 06:00 UTC

The Snapshot

🔴 MOST CROWDED SHORT THIS WEEK Pair: EURNZD SSI: -2.3517 | Percentile: 41st | Z: -1.146 SHORT for 613h

🟢 MOST CROWDED LONG THIS WEEK Pair: NZDUSD SSI: 1.3444 | Percentile: 50th | Z: 1.258 LONG for 410h

📊 BIGGEST POSITIONING SHIFT (7 DAYS) Pair: AUDCHF SSI: 13.4496 | Percentile: 92nd | Z: 0.916 LONG for 218h

Pair in Focus: GBPUSD

GBPUSD is currently at SSI -1.0366, placing it in the 39.0th percentile since March 2014.

Full Positioning Table -- All 28 Pairs

One Thing to Watch This Week

No high-impact events scheduled this week.

Definitions

Retail FX Positioning: Week of 2026-03-16 (#2)

FX Engineer — Mon, 16 Mar 2026 05:33:06 GMT

Week of 2026-03-16 | Issue #2 | Published Every Monday 06:00 UTC

The Snapshot

MOST CROWDED SHORT THIS WEEK Pair: EURNZD SSI: -2.2246 | Percentile: 47th | Z: -1.793 SHORT for 480h | At z-extreme for 72h

MOST CROWDED LONG THIS WEEK Pair: NZDUSD SSI: 1.8205 | Percentile: 91st | Z: 1.354 LONG for 277h

BIGGEST POSITIONING SHIFT (7 DAYS) Pair: AUDCHF SSI: 12.4 | Percentile: 87th | Z: 1.321 LONG for 85h

Pair in Focus: EURJPY

EURJPY Pair in Focus

The SSI for EURJPY reads -3.1285, placing current retail positioning at the 12.9th historical percentile since March 2014. This means the crowd is more heavily net short than roughly 87% of all historical readings. Extreme net short skew at this level has historically been a rare condition for this pair.

The crowd has held the short side for 881 consecutive hours. The z-score sits at -1.114, which falls short of the 1.5 threshold that defines an extreme reading. Hours at that extreme level currently stand at zero, against a historical average extreme run of just 2.8 hours. The 7-day shift of -0.3673 shows the skew has continued deepening modestly over the past week.

Three central bank decisions land this week, all directly relevant to EURJPY. The FOMC decision on March 18 sets broader risk tone. The ECB and BOJ decisions both fall on March 19. Both the euro and the yen side of this pair face simultaneous policy catalysts, making this an unusually dense event window for positioning volatility.

Full Positioning Table -- All 28 Pairs

* Thin-market pair: SSI ratio exceeds 15:1, likely reflecting single-digit short interest rather than broad crowd positioning. Treat with caution.

One Thing to Watch This Week

THIS WEEK'S EVENT Event: FOMC Rate Decision | Date: 2026-03-18 Currency: USD | Importance: HIGH

Definitions

SSI | The ratio of retail traders holding long positions to those holding short positions on a given currency pair.

Z-Score | A standardized measure of how far current SSI deviates from its recent average, expressed in standard deviations. (resolution: 2-hour bars (SSI resampled to 2h using last value per window); lookback: 30 bars (60 hours))

Extreme | An SSI reading whose z-score exceeds 1.5 in absolute value (either direction). (threshold: 1.5 standard deviations (absolute); base_rate: ~25.4% of all 2-hour windows (empirical, RP-001))

Extreme Streak | The number of consecutive hours during which the SSI z-score has remained above the extreme threshold (abs(z) > 1.5). (threshold: 1.5 standard deviations (absolute); resolution: 2-hour bars)

Same Side | The number of consecutive hours the crowd has been net long (SSI > 0) or net short (SSI < 0) without crossing zero.

Percentile | Where the current SSI reading falls relative to all historical readings for that pair since March 2014. (history: All available data (March 2014 to present, hourly))

7D Shift | The change in raw SSI value over the past 7 calendar days.

Thin Market | A pair where the absolute SSI ratio exceeds 15, indicating that one side of the trade has single-digit participation. (threshold: 15 (absolute SSI ratio))