Adding to long term position

My strategy buys stocks and hold them for months with a limit-less stop, sometimes adding new positions in the same stock with a different stop. Every entry+stop is considered an independent trade.

Initially I tried implementing this with complex orders but I only need to maintain the initial buy for 1 day and stop order can’t have a different time frame that the buy order.

Now I’ve tried setting the stop loss separately after the buy is completed which works but now I can’t add another position in the same stock due to wash trade error.

How should I proceed? Thanks.