Regarding your method and suggestions above is another effective investment strategy for buying but depending on one's financial goals, risk tolerance and market knowledge whether they want to use it or not, it's just that the lack of costs is a bit draining because for regular purchases.
When there are suggestions and more effective ways for investment goals with long-term targets, it is more tolerable for profits and not risks because things related to risk have already been understood by investors. Because the aim of purchasing at a low price by arranging it in stages is for greater profits even though this does drain more capital, although it is not enough to feel it because it is used based on the capabilities we have now.