Base Metals Trading Journal
Base metals trading requires journaling LME inventory levels, China PMI readings, and catalyst type alongside price — the structured data that reveals which fundamental edge actually generates alpha.
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Trading Hours & Instruments
| LME Ring (Kerb) Session | 11:40 – 17:00 |
| LME Electronic (LMEselect) | 01:00 – 19:00 |
| COMEX Regular Session | 08:00 – 13:30 |
| SHFE Morning Session | 09:00 – 11:30 |
| SHFE Afternoon Session | 13:30 – 15:00 |
LME times are London (GMT/BST). COMEX times are New York ET. SHFE times are China Standard Time (CST). LME and COMEX overlap from 13:00–13:30 London time, creating peak liquidity.
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Tax & Regulations
In the United States, COMEX base metals futures are treated as Section 1256 contracts — 60% long-term / 40% short-term capital gains regardless of holding period. LME contracts held through UK brokers may be subject to UK tax rules. Consult a tax advisor for cross-border positions.
COMEX is regulated by the CFTC. LME is regulated by the FCA (UK). SHFE operates under CSRC supervision. Position limits apply on COMEX HG copper; LME imposes lending limits to prevent artificial squeezes following the 2022 nickel incident.
Trading Challenges
Multi-Exchange Price Divergence
Copper trades simultaneously on COMEX, LME, and SHFE, and prices can diverge by more than $100/mt due to import premiums, currency moves, and local supply-demand. Traders who only watch one exchange can misread the global signal.
Notional Exposure vs. Margin Confusion
COMEX HG copper requires roughly $5,000–$8,000 initial margin per contract, but controls $102,500 in notional value at $4.10/lb. Traders risk-sizing off margin instead of notional routinely over-lever their accounts.
Macro Catalyst Identification
A base metals move can be driven by a China PMI print, an LME inventory drawdown, a smelter curtailment, a currency shift, or a pure technical breakout. Without labeling the catalyst, post-trade review is nearly useless.
Inventory Data Timing
LME publishes warehouse inventory data daily before London open; SHFE publishes weekly on Fridays. Traders who miss these releases trade blindfolded on the most predictive fundamental indicator in the market.
Spread Trade Accounting
Cash-to-3-month LME spreads and inter-metal spreads (copper vs. aluminum, for example) are distinct strategies with different P&L profiles. Standard journal templates designed for directional trades misrepresent spread P&L.
How JournalPlus Helps
Structured Fundamental Logging
Build a pre-entry checklist into your journal covering LME inventory level, China PMI reading, SHFE/LME premium, and energy cost index. Completing this checklist before each trade forces deliberate fundamental analysis and creates a searchable database for pattern review.
Notional-Based Position Sizing Rules
Define your maximum notional exposure per trade (e.g., 10% of account) and maximum dollar risk per trade (e.g., 1-2% of account). Journal both limits alongside actual exposure. A $100,000 account should rarely exceed 1-2 COMEX HG contracts simultaneously.
Pre-Defined Circuit-Breaker Rules
Document maximum loss-per-trade and maximum daily loss in your journal before any trading session. The March 2022 LME nickel incident — where prices doubled to $100,000/mt in hours — demonstrates that verbal risk rules are worthless under extreme conditions; written, pre-committed limits are not.
Catalyst-Filtered Review Process
Monthly, filter your journal by catalyst type and calculate win rate, average R, and average holding period separately for each category. This turns raw trade data into specific edge identification — which input is driving your results.
Energy-Sensitivity Tags for Aluminum and Zinc
Aluminum and zinc production is heavily energy-intensive. Tag trades in these metals with the prevailing European natural gas price environment (low/normal/elevated/extreme). Over time, seasonal and geopolitical energy patterns become visible in your performance data.
Journaling Tips & Metrics
Log LME inventory level and weekly change on every entry
LME publishes daily warehouse tonnage for each metal. Record the absolute level and the week-over-week change in tonnes at the time of entry. This single data point, accumulated over dozens of trades, becomes the most predictive variable in most base metals backtests.
Tag catalyst type before analyzing the chart
Decide what drove the trade idea — macro event, inventory signal, energy disruption, technical setup, or spread opportunity — before you look at the chart. Post-entry rationalization is the primary source of edge dilution in base metals trading.
Record notional exposure, not just contract count
"2 HG contracts" means nothing in risk terms. "2 HG contracts at $4.08/lb = $204,000 notional, $5,000 risk to stop at $3.98/lb = 2.5% of $200,000 account" is a complete risk picture. Get in the habit of writing the full equation.
Track SHFE-LME copper premium separately
The SHFE-LME copper premium (or discount) reflects China import economics and can range from $50 to $500/mt. Logging this spread at entry creates a dataset that reveals how China's import cycle affects COMEX price direction.
Note LME lending limit status for nickel and tin
After the 2022 nickel squeeze, LME implemented lending limits and circuit breakers on nickel. Log whether lending limits are active (and at what level) for any nickel trade, since these directly cap short-side risk but also limit exit liquidity.
Base metals — copper, aluminum, nickel, zinc, lead, and tin — are the structural backbone of global industrial output, and their futures markets on the LME, COMEX, and SHFE are among the most fundamentally complex instruments a trader can access. Unlike equity or currency markets, every price move in base metals is an intersection of industrial demand cycles, Chinese manufacturing activity, energy costs, warehouse inventory flows, and currency dynamics. A base metals trading journal that captures only price, size, and P&L misses the variables that actually drive outcomes.
Key Statistics
| Metric | Value | Source |
|---|---|---|
| COMEX HG notional per contract (at $4.10/lb) | $102,500 | CME Group |
| P&L per $0.01/lb move on HG copper | $250 | CME Group contract specs |
| China share of global refined copper consumption | ~55% | International Copper Association |
| LME aluminum all-time high | $3,849/mt | LME, March 2022 |
| LME nickel squeeze peak price | $100,000/mt | LME, March 8 2022 |
| European aluminum capacity curtailed (2021–2022) | ~1 million tonnes/year | Industry estimates |
These numbers illustrate why base metals futures demand a different journaling discipline than financial instruments. A single COMEX HG contract controls over $100,000 in notional value on roughly $5,000–$8,000 in margin — a leverage ratio that punishes imprecise risk sizing instantly.
Trading Hours
| Session | Open | Close | Timezone |
|---|---|---|---|
| LME Ring (Kerb) | 11:40 | 17:00 | London (GMT/BST) |
| LME Electronic (LMEselect) | 01:00 | 19:00 | London (GMT/BST) |
| COMEX Regular Session | 08:00 | 13:30 | New York (ET) |
| SHFE Morning | 09:00 | 11:30 | China Standard Time |
| SHFE Afternoon | 13:30 | 15:00 | China Standard Time |
The LME and COMEX overlap for roughly 30 minutes around 13:00–13:30 London time, which consistently produces the highest intraday liquidity and tightest spreads. SHFE opens well before either Western exchange; significant SHFE moves during Asian hours often telegraph direction for the LME open. Log the SHFE settlement price as part of your pre-trade context for any copper or aluminum position.
Popular Instruments
Copper is the most actively traded base metal globally. COMEX HG is the primary US vehicle (25,000 lbs/contract); the LME 3-month contract is the global pricing benchmark; SHFE copper (lot size: 5 metric tonnes) reflects China’s domestic market and carries an import premium or discount that ranges historically from $50 to $500/mt depending on inventory economics. Copper’s role as a leading indicator for construction and EV manufacturing makes it uniquely sensitive to macro data.
Aluminum trades primarily on the LME (25-tonne lots) and SHFE. It is the most energy-intensive of the six metals to produce — roughly 14–16 MWh per tonne — making it highly reactive to electricity prices. European smelter curtailments in 2021–2022 idled approximately 1 million tonnes of annual capacity, contributing to LME aluminum reaching its all-time high of $3,849/mt in March 2022.
Nickel trades on the LME (6-tonne lots) and is the direct EV battery input most sensitive to EV adoption rates. NMC battery chemistry requires roughly 35–80 kg of nickel per vehicle depending on pack size. Nickel’s liquidity profile changed materially after the March 2022 short squeeze; position sizing discipline for this metal warrants its own journal review.
Zinc, Lead, and Tin all trade on the LME. Zinc and lead are often co-produced (from the same ore) and trade in correlated ranges. Tin is the smallest and least liquid of the six, with historically elevated volatility relative to its price. The LME publishes daily warehouse inventory data for all six metals — a dataset that is central to fundamental analysis in this market.
Popular Brokers
| Broker | Import to JournalPlus | Notes |
|---|---|---|
| Interactive Brokers | Supported | COMEX and LME access; CSV + API import |
| Advantage Futures | Supported | US futures specialist; CME/COMEX focus |
| Phillip Capital | Supported | Multi-exchange access including SHFE |
| Marex | Not yet supported | LME ring member; institutional and professional |
| StoneX | Not yet supported | Full LME, COMEX, and SHFE coverage |
For traders using brokers without direct JournalPlus import, manual CSV entry with custom fields for LME inventory and catalyst type preserves the analytical value of the journal.
Challenges & Solutions
Multi-Exchange Price Divergence
Copper trades simultaneously on COMEX, LME, and SHFE, and prices can diverge by more than $100/mt due to import premiums, currency fluctuations, and local inventory conditions. Traders who reference only one exchange routinely misread the global supply signal.
Solution: Record which exchange’s price you’re referencing at entry and exit. Log the SHFE-LME premium or discount as a separate field — systematic tracking of this spread over dozens of trades reveals China import cycle patterns that directional signals alone cannot surface.
Notional Exposure vs. Margin Confusion
COMEX HG copper requires roughly $5,000–$8,000 in initial margin per contract but controls over $102,500 in notional value. Traders who size positions off margin requirements rather than notional exposure routinely over-lever. A $50,000 account carrying 4 HG contracts has $410,000 in notional exposure — 8:1 before a price move.
Solution: Journal both figures on every trade: margin posted and notional controlled. Calculate notional risk (stop distance in cents × $250/cent) before entering, and set a hard rule — for example, notional exposure not to exceed 3× account value.
Macro Catalyst Identification
A base metals move can be driven by a China PMI print, an LME inventory drawdown, a smelter curtailment, a USD move, or a purely technical breakout. Without labeling the catalyst, post-trade review becomes noise.
Solution: Add a required catalyst type tag to every entry — macro event, fundamental/inventory, energy/smelter, technical, or spread. Filtering journal data by catalyst type during monthly review is the fastest way to identify which market conditions your approach actually exploits.
Inventory Data Timing
LME publishes daily warehouse inventory for all six metals before London open. SHFE publishes weekly on Fridays. Missing these releases means trading without the most predictive public data in the market.
Solution: Log the LME inventory level in tonnes and the week-over-week change as mandatory fields on every journal entry. Treat an unchecked inventory box as an incomplete trade record.
Spread Trade Accounting
Cash-to-3-month LME spreads and inter-metal spreads (copper vs. aluminum, for instance) have P&L structures that standard directional trade templates misrepresent. Recording only the price of one leg distorts average win rate and R-multiple calculations.
Solution: Create paired journal entries for spread legs sharing a common spread ID. Track the spread value — in $/mt, as contango or backwardation — at entry and exit, not just the individual prices of each leg.
Journaling Tips for Base Metals
Log LME inventory before every trade. The daily LME inventory report is freely available and takes 90 seconds to read. Record the absolute level in tonnes and the day-over-day or week-over-week change. A consecutive 5-day drawdown in LME copper inventory is a quantitatively different setup than a static inventory environment — your journal should distinguish between them.
Tag catalyst type before examining the chart. Decide what drove the trade idea — macro data, inventory signal, energy disruption, technical breakout, or spread dislocation — before reviewing the price chart. Forcing this classification pre-chart prevents post-hoc rationalization and keeps your catalyst-filtered win rate statistics meaningful.
Track the SHFE-LME premium for copper. This spread reflects China’s domestic inventory and import economics. When the SHFE premium is wide, Chinese importers are incentivized to buy LME copper, which tightens LME spreads. Logging this figure at each entry reveals how import cycle dynamics correlate with trade outcomes over time.
Use energy price tags for aluminum and zinc. Label each aluminum or zinc trade with the prevailing European gas price environment: normal, elevated (above 80 EUR/MWh), or extreme (above 150 EUR/MWh). Smelter margin compression patterns become statistically visible after 30–40 tagged trades.
Document pre-trade circuit-breaker rules. The LME nickel event of March 2022 — where prices rose from approximately $29,000/mt to over $100,000/mt in under 24 hours — demonstrated that verbal risk rules collapse under extreme conditions. Write maximum loss per trade and maximum daily loss into the journal before each session opens.
Key Metrics to Track
- Notional exposure ($) — total market value controlled, not margin posted
- Dollar risk to stop — stop distance in cents × $250 per cent (for COMEX HG)
- Catalyst type — macro / inventory / energy / technical / spread
- LME inventory at entry (tonnes) — and week-over-week change
- China Caixin Manufacturing PMI at entry — with 50 as the expansion threshold
- SHFE-LME copper premium/discount ($/mt) — for copper trades
- Contango or backwardation level — for LME spread trades
- Energy price environment tag — for aluminum and zinc trades
- R-multiple realized — actual outcome vs. planned risk
- Win rate by catalyst type — the primary edge-identification filter
- Holding period — base metals fundamental setups typically resolve in 5–20 trading days
A Concrete Example
A trader observes LME copper warehouse inventories fall 15,000 tonnes in a single week — a multi-month low — while China’s Caixin Manufacturing PMI prints above 51. They go long 2 COMEX HG contracts at $4.08/lb (notional: $204,000), setting a stop at $3.98/lb. Dollar risk: $2,500 per contract, $5,000 total, representing 5% of a $100,000 account — above the standard 1–2% threshold, but justified in the journal by the confluence of two independent bullish signals. Target: $4.28/lb based on prior resistance.
The journal entry records: catalyst type = “fundamental + macro”, LME inventory = 42,000 tonnes (down 15,000 week-over-week), Caixin PMI = 51.2, notional exposure = $204,000, dollar risk = $5,000.
Copper rallies to $4.25/lb over 8 days. The trader exits for a $4,250 gain per contract — $8,500 total. Six months of structured journaling later, filtering by “inventory drawdown + China PMI above 50” reveals a 68% win rate across 22 similar setups. That is a specific, actionable edge that existed only because the data was captured systematically.
How JournalPlus Helps
JournalPlus supports custom fields, which is essential for base metals traders who need to log LME inventory levels, catalyst types, SHFE premiums, and energy environment tags alongside standard trade data. These fields are searchable and filterable — running a report filtered to “catalyst: inventory” shows win rate, average R, and average holding period for that specific setup type across the full trade history.
For commodities traders working across COMEX and LME, multi-currency P&L handling ensures that positions denominated in GBP (LME) are converted accurately for account-level risk reporting. Timezone-aware trade logging supports accurate session classification across LME London, COMEX New York, and SHFE Shanghai hours simultaneously.
Broker import is available for Interactive Brokers and Advantage Futures, covering the majority of retail COMEX copper traders. For LME-focused traders using Marex or StoneX, manual CSV import preserves the full journal workflow including custom fields — the key analytical value remains intact regardless of import method.
The $159 one-time pricing includes lifetime access and all future updates, which matters for traders who build multi-year performance databases. A base metals journal’s analytical value compounds with each trade added; a subscription model creates friction against maintaining a long-term dataset.
What Traders Say
"Tagging catalyst type on every base metals trade was the single change that showed me my fundamental setups had a 70% win rate while my purely technical entries were coin flips. I restructured my entire approach around that one data point."
"After the nickel squeeze I started documenting my pre-trade circuit-breaker rules in JournalPlus. Having them written down before the session means I actually follow them when things move fast."
Frequently Asked Questions
What should I track in a base metals trading journal beyond price?
Record LME warehouse inventory levels (absolute and week-over-week change), China Caixin Manufacturing PMI, catalyst type (macro/inventory/energy/technical/spread), notional exposure, and for aluminum or zinc trades, the prevailing energy price environment. These fields transform a log of prices into an edge-identification system.
How do I calculate position size for COMEX copper futures?
Each COMEX HG contract is 25,000 lbs. A $0.01/lb move equals $250 P&L. To size a trade, divide your maximum dollar risk by the dollar distance to your stop, then divide by $250 to get contracts. At $4.10/lb, one contract controls $102,500 notional — always journal notional exposure alongside contract count.
What caused the LME nickel short squeeze in 2022?
In March 2022, LME nickel prices rose from approximately $29,000/mt to over $100,000/mt within 24 hours due to a massive short position held by a Chinese producer facing margin calls. The LME halted trading and cancelled executed trades. The event is the primary case study for why base metals traders must set and document hard stop-loss and position-limit rules before entering any trade.
Why does China PMI matter so much for base metals trading?
China accounts for roughly 55% of global refined copper consumption and dominates demand for most other base metals. When China's manufacturing PMI crosses 50 (expansion territory), metals demand expectations rise and prices typically follow. Logging the PMI reading at each trade entry creates a quantifiable record of how macro conditions correlated with your outcomes.
How is a base metals trading journal different from a standard futures journal?
A base metals journal requires additional fundamental fields — LME inventory levels, China import data, SHFE-LME spread, energy cost tags, and catalyst type classification — that are not relevant to financial futures like equity indices. It also needs spread-trade accounting for cash-to-3-month LME spreads and inter-metal spread positions, which have different P&L structures than directional futures trades.
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