Hi gary1288, In MultiCharts there is a wide choice of supported data feeds and brokers that you can combine to your needs. Here you can see the full list of supported brokers and data feeds . After you get an account, you can connect your MultiCharts to it. Please check the connection guides here ....

Yes, either click on the up arrow or erase the default number and type in the desired contract size.

but if i restart multicharts my default order is 1 again

Hi stahen,

You can specify the number of contracts in the special field on the Chart Trading Panel. Please find the screenshot attached for reference.
More info about manual trading is here.

but default order size is =1. can I change the default order size?

Hi, I don't find settings for the default order size for chart trader orders. can you help me please?

same here TWS Build 10.21.1b, Jan 12, 2023
...TWS warning message: Id= 1000030; code= 2176; description= Warnhinweis: Your API version does not support fractional share size rules. Please upgrade to a minimum version 163.