The Expert Advisor is designed primarily for the GBP / USD pair M15 timeframe, but it can also be used on other major pairs with preliminary testing using minimal risks. In the Expert Advisor parameters, you can change the lot size. The Expert Advisor is based on several indicators: Percent BB, Steady Bands, and Donchian Channel. The Expert Advisor opens a buy deal at the opening of a new day if all the conditions of the above Indicators are met. 

Below are screenshots of testing since 2018. 

Initial balance = $ 100.

Net profit = $ 1,181,627.

Drawdown = 10% with a risk of 5% per trade. 

Percentage of winning and losing trades = 89/11%

Accounts are best used where the spread is small and fixed.

Before using it on a live account, test the Expert Advisor with minimal risk.