By default, WT Sim restricts trades over 10,000 shares, as most brokers charge fees for trades larger than 5,000 shares. Additionally, 10,000 shares is normally a very high-risk trade that can result in very large amount of slippage for an order unless set as a limit order.
The error message normally looks like the one below:
We do not suggest to change this setting in WT Sim as it helps traders understand when they might be trading a large size,. However, it can still be changed despite our strong recommendation. Simply follow the steps in the image below to adjustthe soft share size limit:
If you still get a share size restriction error, please email simulator@warriortrading.com for us to look into your account further.