By EdgeSizer · Updated May 2025
Gold futures (GC) position sizing is straightforward once you understand the contract structure — but many traders coming from index futures are surprised by how capital-intensive GC can be. At $100 per point, a 10-point stop on a single GC contract costs $1,000 in risk. That's not a typo. Get the math wrong on GC and one trade can wipe most of a prop firm account's drawdown buffer in a single session.
This guide covers everything you need to calculate GC position size correctly: the contract specs, the formula, real examples with tight and wide stops, how GC compares to the micro gold contract (MGC), and how to use the EdgeSizer calculator to set up your OCO brackets before every gold trade.
Gold futures (GC) trade on the CME's COMEX division. Each contract represents 100 troy ounces of gold. Here's what you need to know:
| Spec | Value |
|---|---|
| Underlying | Gold (100 troy oz per contract) |
| Tick size | $0.10 per troy oz |
| Tick value | $10.00 per tick |
| Point value | $100.00 per point |
| Typical daily range | 15–40 points (varies with volatility) |
| Micro equivalent | MGC (1/10th size, $10/point) |
| Session hours | Globex: nearly 24 hours, most liquid 8 AM–1:30 PM ET |
The $100/point multiplier is what makes GC so capital-intensive. Compare that to MNQ at $2/point or ES at $50/point — GC is twice as expensive per point as ES. Traders who underestimate this come from index futures, see a "small" 5-point stop in gold, and don't realize they've just committed $500 per contract of risk.
Same formula structure as every other futures contract, plugged with GC's $100/point value:
Because GC moves in $0.10 increments (ticks), you can also express your stop in ticks. A 2-point stop is 20 ticks. A 10-point stop is 100 ticks. The formula works either way as long as you're consistent:
Both formulas give the same result. Use whichever matches how you think about your stop distance on a GC chart.
You see a GC setup at $2,380.00 with a stop at $2,378.00. That's a 2-point stop, or 20 ticks. Your risk budget is $500.
Two GC contracts with a 2-point stop. This is a compact, well-sized trade. If both contracts hit the stop, you lose $400 — a reasonable loss on a $50K prop combine. The challenge with a 2-point stop on GC is that it's tight. Gold can move 2 points on normal intraday noise. Make sure your technical setup truly warrants a stop this close.
A swing setup with a stop at $2,350.00 and entry at $2,360.00. Ten-point stop. Same $500 risk budget.
Zero contracts. You literally cannot take this trade on GC with a $500 risk budget — one contract alone costs $1,000 of risk at a 10-point stop. This is where MGC becomes the solution. Ten MGC contracts at a 10-point stop = $1,000 risk? No — MGC is $10/point, so 5 MGC = $500 risk exactly. Switch to MGC for any GC setup where the stop forces you below 1 full contract.
A cleaner setup on a larger account. Entry at $2,405.00, stop at $2,400.00 (5-point stop), risk budget of $800.
One GC contract at $500 risk is well within the Apex $100K drawdown parameters. The alternative of 8 MGC gives you slightly more flexibility for scaling out at multiple TP levels if your setup warrants it.
MGC is the Micro Gold contract — exactly 1/10th the size of GC at $10 per point. The same position sizing logic applies: divide your risk by (stop points × $10) to get your MGC contract count.
| Scenario | GC Result | MGC Alternative |
|---|---|---|
| $300 risk, 3-pt stop | 1.0 GC exactly | 10 MGC (same dollar risk) |
| $200 risk, 5-pt stop | 0.4 GC (not viable) | 4 MGC |
| $600 risk, 4-pt stop | 1.5 → 1 GC | 15 MGC |
| $1,000 risk, 5-pt stop | 2 GC | 20 MGC |
MGC is the go-to for smaller accounts or wide-stop setups where GC math forces you to 0 contracts. The liquidity on MGC is decent during the main session, though GC is far more liquid if you're scaling up. For prop firm traders in evaluation, MGC often makes more sense simply because the smaller denominator gives you more control over your exact dollar risk.
Traders who primarily trade MNQ often underestimate GC because they see similar chart patterns and assume similar dollar exposure. The reality is that GC at even 1 contract puts $100 of real dollar risk on the table for every point the market moves. A routine 20-point intraday swing in gold is $2,000 per contract — the same range that produces $40 on a single MNQ contract.
This means that on a $50K prop combine, you're generally looking at 1 GC contract as your maximum position, and frequently fewer depending on your stop. This isn't a criticism of GC as a market — it's just the reality of the contract size. Many experienced gold traders stick to MGC exclusively for evaluation accounts and reserve full GC for their funded accounts where they have more capital to work with.
Gold is particularly sensitive to three types of events, and as a prop firm trader you need to know these cold because they can create outsized moves that overwhelm even well-placed stops:
CPI and inflation data: Hot inflation prints often send gold higher (inflation hedge demand) while cooling inflation can send it lower. The initial reaction is usually in the direction of the inflation trend, but reversals are common once the Fed rate implication is priced in.
Fed decisions and Fed Chair speeches: Dovish tone (rate cuts or pauses) is typically bullish for gold because it weakens the dollar. Hawkish tone (rate hikes or tightening) is typically bearish. The FOMC press conference can produce 30-50 point moves on GC in under a minute.
Geopolitical events: Gold is a safe-haven asset. Escalating geopolitical tension — wars, financial crises, banking sector stress — drives sudden gold spikes that don't follow normal technical patterns. These events can cause 20-40 point gaps that will blow through any stop you had placed.
The prop firm rule for gold news events is the same as for index events: flatten before the release, wait for the initial volatility to settle, and re-enter based on the post-news structure at half-normal size with a wider stop.
Most major prop firms allow GC and MGC trading, but there are some important nuances to verify before you trade:
The EdgeSizer calculator handles GC and MGC with the correct CME-verified tick values built in. To size a GC trade, you input your entry price, stop price, and the dollar amount you want to risk. The calculator outputs your contract count and — critically — the dollar amounts for each of your OCO bracket levels.
For a 2-contract GC position split across two TP levels, the OCO bracket amounts change depending on your TP distances. If your first TP is 3 points away and your second TP is 8 points away, those aren't equal dollar amounts and they need to be entered correctly in your platform. Getting the bracket amounts right from the start prevents the scenario where you're manually calculating OCO prices in the heat of a moving market.
Select "GC" or "MGC" in the instrument dropdown, enter your numbers, and get the exact bracket levels to paste into your trading platform before you click buy or sell.