SPX500 Lot Size Calculator

Lot size for SPX500 (S&P 500) on MetaTrader 4. Risk percent and stop in points, lots to open out.

Built for MetaTrader 4 New Order. Same formula on every symbol: risk money divided by stop distance times the value of 1.00 lot per pip or point. Check Tick value in Specification if your broker’s contract is not the preset.

Lots to open (MT4)5
Mini lots (0.10)50
Micro lots (0.01)500
Contract units5
Value / 1.00 lot / 1 point1 USD
Risk if stop hits100 USD

Presets are common CFD specs. If MT4 Specification shows another Tick value, type that number. Brokers round lots (often 0.01). Spread can take the stop before your distance.

What is SPX500?

SPX500 is a CFD on the S&P 500, the benchmark index of 500 large US companies.

SPX500 point value and contract size

On SPX500 one point is a move of 1.0 in the index level. The preset for 1.00 lot is $1 per point, so 0.10 lot is $0.10 and 0.01 lot is $0.01 per point. Some brokers set 1.00 lot of SPX500 to a different amount per point, which is why the calculator lets you type your own tick value.

How to calculate SPX500 lot size

The calculator uses one formula on every market: lots = risk money ÷ (stop in points × value of 1.00 lot per point).

Example: a $10,000 account risking 1% ($100) with a 20 point stop on SPX500: $100 ÷ (20 × $1) = 5 lots.

Double the stop and the lot size halves, with the same $100 at risk. That is the whole point of sizing from the stop instead of picking a lot size first.

How to use the SPX500 lot size calculator

  1. Enter your account size and pick your account currency. Live FX rates convert the result if your account is in another currency.
  2. Set the percent of the account you accept to lose on this trade (1% is a common default) and your stop loss in points, measured from entry to stop on the SPX500 chart.
  3. Check Tick value in MT4 Market Watch, Specification for SPX500. If it differs from the preset, type it in, then read Lots to open and round down to your broker's lot step.

Common SPX500 position sizing mistakes

  • Copying another broker's lot specs. SPX500 contract size and tick value vary by broker, so a lot size from a forum post can be far off on your account.
  • Confusing points with price. On SPX500 one point is 1.00 of price; check how your broker displays it.
  • Picking the lot size first and placing the stop where it fits the lot. Place the stop where the trade idea is wrong, then size.
  • Forgetting spread and slippage. The stop can be hit before price reaches your level, so leave a margin or risk slightly less.

Educational content, not investment advice. Trading leveraged products such as CFDs and forex carries a high risk of losing money.

Frequently Asked Questions

There is no fixed lot size for SPX500; it comes from your risk and your stop. Lots = risk money ÷ (stop in points × $1 per point for 1.00 lot). Example: a $10,000 account risking 1% ($100) with a 20 point stop on SPX500: $100 ÷ (20 × $1) = 5 lots.
With the preset of $1 per point on 1.00 lot, 0.01 lot of SPX500 is worth $0.01 per point. A 100 point move is $1 on 0.01 lot.
With the preset specs, 1.00 lot of SPX500 is worth $1 per point, 0.10 lot $0.10 and 0.01 lot $0.01. If your broker shows another Tick value in MT4 Specification, use that number.
Decide how much money you accept to lose (for example 1% of the account), measure your stop in points from entry, then divide: risk ÷ (stop × value of 1.00 lot per point). This page does it for you and converts to your account currency with live rates.
The preset is 1.00 lot = $1 per index point (contract size 1). Brokers differ, so check Contract size and Tick value in MT4 Specification.
No. Brokers can set different contract sizes, tick values and lot steps for SPX500. Open MT4 Market Watch, right click SPX500, choose Specification, and type the Tick value here if it differs from the preset. Most brokers round lots to 0.01.

MT4 lot size calculators

More free tools

See all tools