NinjaTrader is primarily a futures platform. Instead of lots and pips, it uses contracts and ticks. The risk calculation is the same as forex — but the vocabulary and instrument specifications are different. Here is how to calculate the right number of contracts before every trade.
Contracts vs Lots: The Key Difference
| Forex (MT4/MT5) | Futures (NinjaTrader) |
|---|---|
| Position size = lots | Position size = contracts |
| Risk unit = pips | Risk unit = ticks |
| Pip value varies by instrument | Tick value set by exchange |
| Micro lots (0.01) for small accounts | Micro E-mini contracts for small accounts |
The underlying math is identical. You’re dividing your dollar risk by the cost of your stop in monetary terms.
The Futures Position Sizing Formula
Dollar Risk = Account Balance × (Risk % ÷ 100)
Stop in $ = Stop Loss Ticks × Tick Value
Contracts = Dollar Risk ÷ Stop in $Example: $50,000 account, 1% risk ($500), 10-tick stop on NQ (Nasdaq):
- NQ tick value = $5.00
- Stop in $ = 10 × $5.00 = $50.00
- Contracts = $500 ÷ $50.00 = 10 NQ contracts
10 NQ contracts is a very large position for most retail traders. More realistic at this account size would be MNQ (Micro Nasdaq) where the tick value is $0.50.
NinjaTrader Instrument Tick Value Reference
| Instrument | Full Name | Tick Size | Tick Value | Exchange |
|---|---|---|---|---|
| ES | E-mini S&P 500 | 0.25 points | $12.50 | CME |
| NQ | E-mini Nasdaq 100 | 0.25 points | $5.00 | CME |
| RTY | E-mini Russell 2000 | 0.10 points | $5.00 | CME |
| YM | E-mini Dow Jones | 1 point | $5.00 | CBOT |
| MES | Micro E-mini S&P 500 | 0.25 points | $1.25 | CME |
| MNQ | Micro E-mini Nasdaq | 0.25 points | $0.50 | CME |
| MYM | Micro E-mini Dow | 1 point | $0.50 | CBOT |
| M2K | Micro E-mini Russell | 0.10 points | $0.50 | CME |
| CL | Crude Oil | 0.01 points | $10.00 | NYMEX |
| GC | Gold (futures) | 0.10 points | $10.00 | COMEX |
| ZB | 30-Year T-Bond | 1/32 point | $31.25 | CBOT |
| 6E | Euro FX | 0.0001 | $12.50 | CME |
Important: tick values above are for standard contracts. Always verify in NinjaTrader’s instrument specification panel (Ctrl+I) before trading a new instrument.
Worked Examples
Example 1: ES (S&P 500 E-mini)
Account: $30,000
Risk: 1% = $300
Stop: 4 points = 16 ticks (4 ÷ 0.25)
Tick value: $12.50
Stop in $ = 16 ticks × $12.50 = $200
Contracts = $300 ÷ $200 = 1.5 → round to 1 contractOne ES contract at a 4-point stop risks $200 — 0.67% of the $30,000 account. Acceptable.
Example 2: NQ (Nasdaq E-mini)
Account: $50,000
Risk: 0.5% = $250
Stop: 15 points = 60 ticks
Tick value: $5.00
Stop in $ = 60 ticks × $5.00 = $300
Contracts = $250 ÷ $300 = 0.83 → round to 0 or use MNQ0.83 contracts rounds to 0 — you can’t trade 0.83 NQ contracts. Options:
- Use 1 MNQ contract (tick value $0.50): Stop in $ = 60 × $0.50 = $30, risk = $30 (0.06% — very small)
- Use multiple MNQ: $250 ÷ $30 = 8.3 → 8 MNQ contracts (risk = $240)
Example 3: MNQ (Micro Nasdaq) for Smaller Accounts
Account: $15,000
Risk: 1% = $150
Stop: 40 ticks (10 points)
Tick value (MNQ): $0.50
Stop in $ = 40 ticks × $0.50 = $20
Contracts = $150 ÷ $20 = 7.5 → 7 MNQ contracts (risk $140)7 MNQ contracts = 0.7 NQ contracts in equivalent exposure. Good precision for the account size.
Contracts by Account Size Reference Table
At 1% risk per trade, ES futures, 8-tick stop (2 points):
| Account | Dollar Risk | Stop in $ | Contracts | Equivalent |
|---|---|---|---|---|
| $10,000 | $100 | $100 | 1 ES | or 8 MES |
| $25,000 | $250 | $100 | 2 ES | or 16 MES |
| $50,000 | $500 | $100 | 5 ES | or 40 MES |
| $100,000 | $1,000 | $100 | 10 ES | or 80 MES |
For smaller stop sizes (tighter stops → larger position), the contract count grows quickly. Always verify the dollar risk displayed in your NinjaTrader order entry panel before confirming.
Using NinjaTrader’s Built-In Sizing Tools
NinjaTrader’s ATM (Automated Trade Management) strategy allows pre-set stop and target distances. To size correctly:
- Go to Chart Trader or the Order Entry panel
- Set your ATM strategy with the target tick count for your stop
- Before confirming quantity, calculate contracts using the formula above
- Enter the quantity manually in the Order Entry panel
- Confirm the trade with the correct contract count
NinjaTrader does not automatically calculate position size based on account risk % — you must do this calculation separately and then enter the contract count.
Using TRADE90 as a Web Companion for NinjaTrader
The TRADE90 position size calculator supports index calculations using a $1-per-point specification that corresponds to the micro contract structure on most instruments. Use it for pre-market sizing prep:
- Open TRADE90 before your NinjaTrader session
- Enter your account balance and risk %
- Select NAS100 or US30 (index instruments)
- Enter your planned entry and stop level
- Note the lot size output — this is your micro contract count equivalent (e.g., 5.00 lots = 5 MNQ contracts at $0.50 per tick equivalence)
For full E-mini contracts (ES, NQ), multiply the MES/MNQ count by 10 and adjust for the 10× contract size difference.
Frequently Asked Questions
Does NinjaTrader have a built-in position size calculator? Not in the traditional risk-based sense. NinjaTrader lets you set ATM strategies with fixed stop distances, but it does not automatically calculate how many contracts to trade based on account risk %. You must calculate contracts separately using the formula above.
How do I calculate NQ contracts for position sizing? Use: Contracts = (Account × Risk %) ÷ (Stop Ticks × $5.00). Round down to the nearest whole number. For sub-contract precision, use MNQ (10 MNQ = 1 NQ).
What account size do I need for ES futures? One ES contract with a 4-point stop risks $200. For this to represent 1% risk, you need a $20,000 account. For 0.5% risk, $40,000. Use MES (10× smaller) for accounts under $20,000.
What is the minimum account for NQ futures day trading? At minimum practical sizing (1 contract, 15-point stop, 60 ticks × $5 = $300 risk), a $30,000 account makes this 1% risk. For professional 0.5% sizing, you need $60,000 for 1 NQ contract at that stop distance.
Can I use a web calculator for NinjaTrader position sizing? Yes. Calculate contracts using the formula, or use the TRADE90 calculator as a quick reference. The index sizing in TRADE90 corresponds to micro contract structures. Verify your final contract count against the expected dollar risk in NinjaTrader’s order panel before confirming.