Stockalyze

1) After identifying the entry candlestick (buy), I want to place a fixed sell one tick below this candle. (my stop loss)
2) My target is fixed and is defined by the size of the entry candlestick.  In this case, the size of this candlestick multiplied by 2

This is interesting. As of now buy, sell, short, and cover signal definitions are independent of each other. If I understand you correctly you want to use buy price value in defining sell signal, right? This is not possible as of now but I can think of the way how to make it possible. Please confirm if I am getting you right.

It's actually simple to implement for me. But I wonder if that is realistic because when market is closed you can only do trading next day and so the signal that used the data of end of day closing price can only be acted upon in following trading session.
Anyways, you have a trading system that you want to test by acting on same day. Let me find time to do it and will give you a beta build to test.

It is expected. When signal occurs it uses the data of that day and so you cannot actually trade the same day. So, 1 day delay in acting on a signal is minimum you can achieve.

Regarding sending screenshot, now you can send it on this forum as you have got an account. But, for this particular case there is no need.

I don't want to open multiple long/short position. How can I do that?

Not sure I understood your question. During testing of a Trading System for a security only one position is created at any point of time. Once that position is closed then only new position is opened whenever there is new signal. So, it is already at most one position at any point of time. Did you mean something else? Please let me know.

One point here to note is that as of now backtesting only opens long positions. You can have a Trading System that can generate signals for long and short both and you can screen stocks for all sorts of signals but backtesting only tests long positions. That in future can change of course.

No and there can't be any. Different stocks can have different winning Trading Systems and that's why in Stockalyze you can test all the Trading Systems at once with multiple stocks and see which Trading Systems work best. Test all the systems and then chose the winner. Testing all Systems is easy in Stockalyze.

It's is a nice suggestion. If I think aloud; how about hooking it with "Symbol Import"? There can be a check-box on Import Symbols dialog that will say "insert symbol if not found"? So, if you have a list of well defined symbols for which you can provide information like Country and Exchange then those symbols can be added if not already present.

Please let me know if this will be an adequate solution in your view.

Regards,
Sacha

Sorry, I couldn't understand what you meant. Can you please elaborate a bit? How exactly the chart will look? An example will be great.

I had replied to your query. Please see my response here https://t.ly/egelk.