The Commission tab allows you to set up global level commission rate information against different instrument types and connectivity providers. Global commission rates can be over ridden by specifying instrument level commission rates. Therefore, when NinjaTrader calculates a trades commission costs, it will use a commission rate value at the instrument level and if one does not exist, it will use the global commission rate.

Adding Commission Rates
We are going to add global commission rate for trading stocks on our Market Replay connection. This means, whenever we connect to our Market Replay connection and trade against it, commission costs will be calculated against the values we will enter below.
1. Locate the Stocks - Market Replay connection and expand the options branch by clicking on the "+" icon. You will a "Commission levels" property (none defined) and a "Minimum commission" property.

2. A lot of brokers who support trading equities have a minimum commission rate. Let's assume that our Market Replay connection minimum commission is $1.00 by setting that value in the property. Then put your mouse cursor in the "Commission levels" property which makes visible the "..." button which allows us to add multiple commission levels.

3. Once you click on the "..." button, a commission level collection editor will appear. We are going to add (press the "New" button) two commission rate levels. $0.01 for the first 500 shares and then $0.005 for every share after that. The image below displays this configuration.
IMPORTANT: If you are setting up a commission rate for futures and you have a single rate, you would enter one commission level with the commission value and the units set to zero.

4. Once complete, the final configuration looks like the image below.
