AI Prompt Library for USD/JPY Forex Trading

USD/JPY is the second most traded currency pair in the world, averaging over $1 trillion in daily volume — yet most retail traders analyze it with the same generic macro framework they apply to EUR/USD. That mismatch is expensive. The yen carries structural drivers — Bank of Japan yield curve control, Ministry of Finance intervention thresholds, and carry trade positioning — that require a purpose-built analytical lens.

AI changes the speed at which a solo trader can process those drivers. A well-constructed prompt can compress three hours of policy reading, rate differential modeling, and technical confluence work into a focused five-minute workflow. The difference between a useful output and a hallucinated one is entirely in how the prompt is structured — and most traders are leaving that edge on the table.

This library gives you the exact prompts to run before, during, and after your USD/JPY sessions. Each one is engineered for the specific mechanics of the pair: BoJ divergence, safe-haven flows, options market skew, and MoF verbal intervention signals. Copy them directly into any LLM and adapt the variable fields to your current setup.

Why USD/JPY Demands Its Own Prompt Architecture

Most currency pairs respond primarily to relative interest rate expectations. USD/JPY does that — but it also responds to a second layer that is almost unique in G10 forex: sovereign intervention risk. The Ministry of Finance has intervened directly in the spot market multiple times since 2022, with moves exceeding 500 pips within hours. No generic ’analyze this currency pair’ prompt accounts for that tail risk.

The BoJ’s yield curve control policy adds a third dimension. When the BoJ adjusts its tolerated range for 10-year JGB yields, USD/JPY reacts violently — not because of rate differentials alone, but because the adjustment signals a potential regime shift in the world’s largest carry trade funding currency. Your prompts need to separate these three drivers: Fed-BoJ rate spread, MoF intervention risk, and carry trade unwind pressure.

Building prompts around these three pillars means every AI output is grounded in the actual mechanics of the pair — not boilerplate macro commentary recycled from EUR/USD analysis.

• Fed-BoJ rate differential: the primary medium-term directional driver
• MoF intervention thresholds: historically triggered near multi-decade highs (145–152 range has drawn direct action)
• Carry trade positioning: JPY weakness accelerates when risk appetite is high; unwinds sharply on risk-off events
• JGB yield curve control: BoJ policy shifts transmit faster to USD/JPY than to any other major pair
• Options skew: 25-delta risk reversals on USD/JPY telegraph institutional hedging bias before spot moves

Prompt 1 — Pre-Session BoJ Divergence Briefing

Before the Tokyo open, you need a rapid read on where the BoJ-Fed policy divergence stands relative to the last session. This prompt compresses that into a structured briefing. Feed it your current USD/JPY spot level, the latest Fed funds futures pricing, and the most recent BoJ statement date.

The output should give you a directional bias score, the key risk events in the next 48 hours, and a plain-language summary of whether divergence is widening or compressing. Widening divergence — Fed hawkish, BoJ holding — is structurally bullish USD/JPY. Compressing divergence, particularly any BoJ hawkish surprise, is the highest-conviction short catalyst in the pair.

You are a G10 forex analyst specializing in JPY dynamics.
Current USD/JPY spot: [PRICE]. Latest Fed funds rate: [RATE]. BoJ policy rate: [RATE]. Last BoJ meeting: [DATE].
Task: Produce a pre-session divergence briefing. Cover (1) current rate differential and trend direction, (2) next 48-hour risk events that could shift BoJ or Fed expectations, (3) a directional bias for today's session — bullish USD/JPY, bearish, or neutral — with a one-sentence rationale.
Keep the output under 200 words. Use plain declarative language. No hedging phrases.

Prompt 2 — MoF Intervention Risk Assessment

Intervention risk is the hardest variable to quantify in USD/JPY trading. The Ministry of Finance does not telegraph its actions — but it does leave signals: escalating verbal warnings from the Finance Minister, unusual volatility in the 10-year JGB, and spot price proximity to historical intervention levels. This prompt synthesizes those signals into a risk score.

Run this prompt when USD/JPY is within 300 pips of a multi-year high or when you have seen two or more MoF verbal warnings in the same week. The output is not a prediction — it is a structured risk flag that tells you whether your position size is appropriate for the current intervention environment.

You are a currency strategist assessing Bank of Japan intervention risk for USD/JPY.
Inputs: Current spot [PRICE]. 52-week high: [PRICE]. Number of MoF verbal warnings in the past 10 days: [NUMBER]. Last confirmed intervention date: [DATE].
Task: (1) Rate intervention risk as Low / Medium / High with a specific rationale referencing the inputs. (2) Identify the price level that would likely trigger MoF action based on historical precedent. (3) Recommend a position-sizing adjustment — maintain, reduce by 25%, or reduce by 50% — given current risk level.
Output in three numbered sections. Be direct.

Prompt 3 — Carry Trade Unwind Scenario Model

JPY is the world’s primary carry trade funding currency. When risk sentiment deteriorates sharply — equity selloffs, credit spread widening, VIX spikes above 25 — leveraged carry positions unwind and USD/JPY can drop 300–600 pips in a session. Traders long USD/JPY for rate differential reasons are simultaneously short volatility, whether they recognize it or not.

This prompt builds a scenario model for carry unwind events. It takes your current positioning, the VIX level, and the S&P 500’s recent trend as inputs, then outputs three scenarios: no unwind, partial unwind, and full unwind — with approximate pip ranges and suggested stop-loss placement for each. It is not a forecast; it is a structured contingency framework.

You are a quantitative forex strategist modeling carry trade unwind risk for USD/JPY.
Inputs: Current USD/JPY: [PRICE]. VIX level: [NUMBER]. S&P 500 5-day trend: [UP/DOWN/FLAT]. Current account position: [LONG/SHORT/FLAT] [LOT SIZE].
Task: Model three scenarios — (1) No unwind: risk sentiment stable, (2) Partial unwind: VIX rises to 25-30, (3) Full unwind: VIX spikes above 35 or major risk event.
For each scenario, provide: expected USD/JPY direction and pip range, recommended stop-loss level, and a one-line rationale.
Format as a table with four columns: Scenario, Direction, Pip Range, Stop Level.

Prompt 4 — Technical Confluence Scanner for JPY Sessions

USD/JPY technical structure behaves differently across sessions. The Tokyo session is dominated by Japanese institutional flows and often consolidates in a 30–50 pip range. The London and New York opens introduce macro catalysts and trend continuation. A prompt that ignores session context will generate technically correct but contextually wrong setups.

Use this prompt after you have identified your key levels — support, resistance, and any pending order clusters visible in the DOM or options market. Feed in the session and the most recent price action pattern, and let the model assess whether the setup has confluence across technical, session, and macro dimensions.

You are a technical analyst specializing in USD/JPY intraday structure.
Inputs: Current session: [TOKYO/LONDON/NEW YORK]. Current price: [PRICE]. Key support: [LEVEL]. Key resistance: [LEVEL]. Most recent candlestick pattern: [PATTERN]. Macro bias from pre-session briefing: [BULLISH/BEARISH/NEUTRAL].
Task: Assess technical confluence. (1) Is the current price action pattern consistent with the macro bias? (2) Which support or resistance level is most likely to be tested in this session? (3) Rate overall setup quality: A (high confluence), B (moderate), or C (avoid).
Provide a maximum of 150 words. Lead with the grade.

Building a Repeatable USD/JPY Workflow with These Prompts

These four prompts are most effective when run in sequence as a pre-trade checklist. Start with the BoJ divergence briefing to establish macro bias. Layer in the intervention risk assessment if spot is elevated. Run the carry unwind scenario model to size the position correctly. Finish with the technical confluence scanner to confirm entry timing. The entire workflow takes under 15 minutes and replaces hours of manual research.

The discipline is in the sequence. Traders who run the technical prompt first and the macro prompts as an afterthought will rationalize entries that the fuller workflow would have filtered out. Structure the workflow so macro context gates technical execution — not the other way around.

As BoJ policy evolves and Fed rate expectations shift, update the variable fields in each prompt at the start of every week. The prompts are durable frameworks; the inputs are live data. Separating those two layers is what makes this library scalable across changing market regimes.

• Step 1 — Run the BoJ divergence briefing before the Tokyo open
• Step 2 — Run the MoF intervention risk assessment if USD/JPY is within 300 pips of a multi-year high
• Step 3 — Run the carry unwind scenario model to calibrate position size
• Step 4 — Run the technical confluence scanner to identify entry timing within the session
• Step 5 — Log the outputs and grade your actual trade result against the model — this creates a feedback loop for prompt refinement