Hey trader,
Maybe you buy 100 shares per trade.
Maybe you do $1,000 per trade.
Maybe it’s one contract per trade.
The average trader picks the same amount every time and calls it a plan.
The thing is, that number has nothing to do with risk management.
It is position sizing by default.
So, when the trade goes wrong, the loss is whatever it turns out to be.
There is a formula that removes the guesswork entirely. It tells you exactly how many contracts to trade on any setup, in any market, before the order goes in.
Here is how to run it.
What Contract Size Actually Tells You
Futures traders are notorious for defaulting to one contract. Oftentimes, they’ll go with contract , whether it’s the mini or the micro. That’s not a risk level. It is a denomination.
It doesn’t matter what you default to. You can trade one micro and risk $30, or you can trade one micro and risk $600.
The contract count or share size tells you nothing about what is actually on the line.
Risk comes from the stop distance, not the number of contracts.
Most traders frame their size around the contract. The right way is the other way around. Start with how much you are willing to lose, then work backward to how many contracts that allows.
For today’s discussion, I’m going to stick with a micro futures contract. But the concept applies to ANY default you pick on any asset.
The Formula
Three inputs. Account size, risk percentage, and the dollar cost of the stop the chart requires.
Take your account balance and multiply it by the percentage you are willing to risk on a single trade. Most traders use 1 to 2 percent.
That number is your dollar risk budget for the trade.
Next, take the stop the chart calls for and convert it to dollars. Divide your risk budget by that number.
The result tells you exactly how many contracts to trade.
Running the Numbers on a Live Trade
This morning, gold set up for a short. The close price was at 3350 and the standard stop sat at 3362.
That is a 12-point stop.
On the full gold contract, 12 points x $100 per point = $1,200 of risk per contract.
Now run the account math. Say you are trading a $3,000 account and you are willing to risk 2 percent.
Two percent of $3,000 is $60. Divide that by the $1,200 the stop requires.
The result is 0.05.
Half a micro. The math says the trade cannot be taken.
That is not a failure of the system. That is the system working. It kept a $3,000 account from taking on $1,200 of risk it could not support.
When the Numbers Come Out Low
If the formula gives you anything below about 0.9, you do not have enough risk budget to take even one micro safely.
The trade does not qualify for your account size.
There are two ways to respond. Skip the trade, or look for a tighter entry with a smaller stop. If the chart allows it, the numbers may shift enough to make the trade workable.
If the result lands at 1.3, one micro keeps you inside your risk limits better than one full contract would.
The exact right answer is whatever keeps your actual risk closest to your intended risk.
The same thing works for share size. And while it’s not all THAT common, if you’re trading a stock that is $1,000, if the stop is at $900 and you only want to risk $60, you can’t take the trade.
Why Micros Are the Right Tool
Ten micros on the same trade gives you more precise risk management than one full contract.
Similarly, you don’t have to trade in 100 share blocks. You can break those 100 shares up however you choose.
You can scale out at different levels, tighten stops more accurately, and stay much closer to your target risk amount.
The traders who hesitate to use micros because they feel too small are missing the point. The goal is not to trade the largest contract available.
The goal is to trade the right size for your account and your stop.
Commissions matter here. Running 12 micros instead of one full contract costs more per trade. Know your commission structure and build it into the calculation.
The Three Steps
Start with your risk percentage before you look at any trade. One to two percent of account is the standard. Write it down so it does not change trade to trade.
Next, find the stop the setup calls for on the chart. Convert that stop to dollars.
Then divide your dollar risk budget by the dollar cost of the stop. That number tells you exactly how many contracts to trade.
Round down to the nearest whole contract if the result is fractional. Run this on every trade. Not most trades. Every trade.
The Takeaway
The traders who stay in this business long enough to get good at it are not the ones who got lucky on size.
They are the ones who treated every entry as a math problem first.
Contract size is not a preference or a habit. It is the output of a calculation.
Run the calculation, and the decision makes itself.
The 10% Club is where I run this math live, on real trades, in real markets, every morning.
👉 Click here to learn more and join us.
Blake Young
Senior Market Strategist, TheoTRADE
