I am looking now for alternatives for MT4-tracker. Can anyone suggest FXBlue or Myfxbook or similar. What would be best to replace MT4-tracker?
Fxblue and MyFxbook that you mentioned are very good alternative you do want to consider.
Which is better?
It really depends on what was the initial/main reason you used the MT4 Tracker for.
In the past I mainly use it to extract the good EA from EA Studio (EAS), I don't depend on it for my EA's performance statistics.
1) Extracting EA - So the alternative method you can use for extracting good EA from Portfolio Expert (EAS) is to open the Portfolio Expert using Meta Editor and go to line 635 and you will see the list of EA from 0 to 99. Delete those EA that you don't want to keep and leave the rest intact. After deleting the unwanted EA, save and compile the file.
2) Statistical Analysis
A) Fxblue is extremely useful for comparison of EA between several portfolios. Imagine you have a few MT4 terminals running with hundreds of EA and you can to compare all these EA together. Fxblue would be the best choice. Set up all the different portfolios under the same user account and under the Portfolio tab you can create the Name of the Portfolio you want and under the "Other Accounts - Click Here" link you can "merge/join" other trading accounts with the current trading account to set up as 1 big Portfolio. Thereafter, you can easily compare all the EA found within these trading accounts.
B) MyFxBook is more suitable for viewing the performance individual Trading accounts. It has nice graph and give a clear overview of the account's performance (Fxblue is also very suitable for viewing individual account's performance, better too). The advantage of MyFxbook is that you can "publish" your trading account for potential investors to take a look etc
I personally use both and Fxblue is my main tool for EA analysis. Fxblue has many features, you can analyse the performance of the portfolio, you can zoom in to analyse the performance of an individual EA (highlight the EA/magic number and click "Filtered Chart" and there are a list of different ways to analyse the EA's performance.
Fxblue also have many other Trader's tool you may also want to explore such as trading simulator, trade copier etc found in this link https://www.fxblue.com/appstore/c2/trader-apps