Personally, I do the DCA every 14 days so every 2 weeks I do the deposit and buy Bitcoin, but I calculate the percentage and see how the market is performing, I dont have a certain amount like for example 100$ every 2 weeks but rather it depend on the market price if the price is on momentum increasing monthly or weekly, I most of the time lower my buy like from 100$ I only bough 90$ since market continue to skyrocket, and vise versa when the market continue to drop, I continue to increase my buying power so I probably going to do 120$ so that I could accumulate more volume. It is still DCA, but it is just my preference since I think it is better, and could give me more profit in the future.
DCA with any strategy you can do including every two weeks and it looks at how the market is performing whether it is going up or down, whereas I don't think about price and DCA is erratic it depends on how money is available.
If there is more than $100 then that's good, if less than that it doesn't matter even if it's only $30 or below the important thing is to buy regularly without thinking about the price. At least that's what I do, the important thing is that I continue to accumulate in my own way.