Some exchanges allow the setting up of automatic DCAing. You can choose an amount and a frequency, perhaps daily, weekly or some other inverval - exchanges will vary in t how an automated DCA could be set up and part of the reason that I don't like them is that they usually cannot be set up for a very specific time, but instead at the the most daily, so the exchange will likely batch all of the DCA's at the same time and might even play shenanigans with the DCAs, though maybe some of the exchanges have improved their systems. If you are going to use an exchange to automatically DCA, I would look into how they describe their way of executing the automatic DCAs.
Manual DCA is that you do your own buy, and surely you can even set your buy up as a market taker limited order rather than having your order be a market maker. Market takers have lower fees than market makers, and of course, people are going to have differing rates and differing options depending on their geographical location and which exchanges are available to them.
Regarding your statement: "it really picks my interest." I am pretty sure you meant to say: "it really piques my interest
Thanks for the clarification sir JayJuanGee and the correction also . We literally learn each day , well I think I will continue with my manual DCAing for now , but I will still like to know more about the automatic DCAing and how it works, so that I can also teach it to others .
I am pretty sure that most major exchanges have such an option to employ some kind of an automatic DCA. Below is a screen shot from BinanceUS's description of various automatic buy options... From the drop down menu, you can choose to buy one time (which is not automatic, it is right away) or you can set up automatic buy parameters within one of the four options that are available through their system.

It is likely that Binance
(not BinanceUS) has some similar options, and some of the exchanges will allow the client to customize their automatic DCA more than others, yet I still have not found an exchange or service that allows the customer to select the hour of the day that his automatic buy is executed, so that is part of my objection to all of the automated DCAs getting executed around the same time or maybe just the lack of transparency regarding when they are actually executed.. but you can see that Binance's automatic DCA is pretty strict (or limited) in terms of when/how you can employ automatic DCA, which is daily or the various other increments that they show which amount to Binance's likely executing the DCAs in somewhat non-transparent ways on about a daily basis for their varying customers with differing automatic DCA preferences...and surely some people don't really care about those kinds of details that might ONLY end up affecting their buy orders by a percentage point or even less.. which is part of the reason that I would just prefer to manually execute my own, in the times that I am inclined to do it... but for some folks it is surely not any big deal as long as they get their buys in at the period that they had specified the exchange to execute their automated DCA buy orders.
Thanks for this wonderful information that I never thought existed. You have once again helped make things easier for me regarding my Bitcoin investing. I first learnt about the DCA method from you and it changed a lot of things for me especially my approach to Bitcoin accumulation; things got rapidly better for me as the DCA method gave me the discipline and mindset I needed to take my Bitcoin portfolio to the next stage. I also learnt from you those other additions such as the emergency funds, reserved funds and other wonderful ideas that makes the investment and holding easy and sustainable.
This information about automatic DCA is another game changer for me as it makes the whole thing easier for me. With it I will only have to login in to the exchange only when I want to make withdrawals or deposits which is normally monthly while my DCA runs weekly. I appreciate your level of selflessness in helping us with out Bitcoin investing.