You’re confusing assets with income. A change in trading account balance is not income. If you move money monthly to your business account and can show regular deposits, that’s income and they’ll allow it for DTV.
I didn't submit any tax documents with my DTV application. 4 year old offer letter stating I was hired as a remote worker, most recent month's bank statement, and 10 year old copy of articles of incorporation for the company. That's it.
I was approved with a single month’s bank statement showing the necessary amount. There was no requirement that it was there for 6 months or any other amount of time.