Suggestion for maximum stop loss when copying orders

hello ctrade team
I have 1 question and also 1 small suggestion.
In the section copying orders from experts, why don't you set a stop loss amount according to % of the account, for example, the copy amount is $ 10,000, if it falls below 70% of the account value, the copy order will automatically close. So if the account is continuously increasing, if the expert is profitable, the copy stop will also be increased, for example, if the expert makes a profit of 50%, then the investor's capital will be $ 15,000. if they keep the old level, they will bear a high level of risk, if they hold the shanj at 30% normally they only lose $ 15,000 x 30% = $ 4500