For the most part 0.1 or even 0.01 are used, have a look at your broker first.
Not all brokers support a 0.001 Lot sizes.
Please post a link with the project as well, makes it easier for people to see it and try to assist...
Hope something like this helps.
https://fxdreema.com/shared/FLIjzp0Ud
But first have a look at your broker.