thank you all, I would like to recap now that are 5 months I am trading, I started with 100 eu, now I have 7.656 EU own capital and my return is still

11 per cent on top

(today a bit less because I forgot to compound some capital in some transaction) so I have at the present only 10.54%. Is that good? I guess so, I survived to different pullbacks in the market and I am getting more confident to raise the bar, just I know that with more money in the game I will suffer biases, exiting too soon because I am loss averse. Although I am day trading I have my few own stocks and I am studying them with a lot of diligence regarding their financials, reports, managers capabilities, macroeconomics etc. Because I have experience on understanding how a company is doing, and I try to read at least 50 percent of The Economist every week, and I am learning a lot, furthermore as (more o less experienced) developer and ex-credit analyst I am going to start to use python to run some query to run some statistical analysis that fit my custom strategy in making data driven decisions.
There are still 3 points not super clear to me.
1) Regarding tech analysis, I read from different sources that is not statistical significant because my stocks are big company where there is a lot of algo trading behind,
but on my stocks I am using my indicators, signals and they work quite good and although there is all this machine it looks to me candles, resistance etc they move quite regularly in terms of trading psychology, namely as I would expect. So I do not get how algorithmic trading is affecting technical analysis at the point that several expert say that does not have too much sense anymore? If I have a machine that exit at the "expected" moment, reading the charts should be more succesful not the other way around, right?
My losses stem from two sources, namely point 2 and 3
2) I am not a pure day trader, so I remain long on my positions because I know the fundamentals of were I invest and I know that there are high chances to get an
opening price really rewarding although I sell and buy them different times(in some high beta days), but a couple of days I got opening price days where I lost a lot of capital before to be able to exit from my position.
(ex Wirecard went from 104 to 39 at the opening of June the 17th, not that I had a position, just as example). I would like to minimize this risk when I know there are some pre market news really dangerous and get a strategy to hedge, counter short the risk, possibly avoiding put options.
3) I do not have the numbers, but I am quite sure that I could have had between 20% and 30% of return if I would have remained monitoring the graphs all day,
so far I did not use any alert!(I am going to do from now on) As consequence I lost a lot doing silly things as going half an hour to the supermarket, or during zoom work meetings where I could not take any action to exit from my positions when a reverse was coming.
If you have some advice regarding my 3 doubts are well accepted of course, but all in all you have been really kind with me and wanted just to update you about my small success