I made this project to test: https://fxdreema.com/shared/JV80bhHue
I found out that it happened with project generated by the website, but not if I compile the .mq5 file with MetaEditor. I investigated a little bit and at the end I uploaded the latest compiler. I think that it works now.
When some program causes 100% CPU load, then the reason could be some infinite loop in the code. That is a code that runs forever in an infinite loop. This would happen if you connect a block with itself. I'm not aware of such problem currently in the generated code, but who knows. Or it can be something else, but I really don't know. I would not expect high CPU only because multiple blocks exist. Yes, many blocks are heavy for the Tester, but the Tester runs them as often as possible.
Some custom indicators are also heavy.
I think that technically there is some limit, because in fact big projects are heavy weight for the server, but this limit is bigger than few 1000s. However, always try to minimize the number of blocks.
@l-andorrà Your two Condition blocks are connected one after another, which means that "Buy now" can be reached only when they are true at the same time. I think the author asks for having the first condition for Buy and the second one for Sell. I would also put "No trade" at the top, because otherwise multiple trades will be created
Let's say that you mean the last closed trade. Then load that trade and below (in my case the Condition block, but it could be in another block) just get the value of SL as a price level, pips or the other format.
I wrote an email to him. If someone finds this topic searching for answer, I gave him 2 ways of doing this.
For each Closed Trade (set "Not more than n trades" to 1) -> check age -> do something. The first block loads the last closed trade only, then "check age" will check how old is it, and then if its old enough continue with whatever blocks are connected next.
In "on Trade" place Trade closed -> Skip Ticks. This "Skip Ticks" block would prevent "on Tick" from working for certain amount of minutes, which means that anything in "on Tick" will stop working for this time.
With what settings it doesn't work?
Is the CPU usage because of the EA or even because of MetaTrader?
This block's name should be something like "Is there any running trade at the moment?". It just tries to find at least 1 trade, and if it finds one, it doesn't pass. Of course, it checks its magic number, symbol and type (buy/sell) if needed, these are the settings of the block. So you can have as many blocks from this one in one EA or multiple EAs. The block doesn't forbid the creation of trades. It's name looks like this only because it needs to be something short.
That's interesting idea. But who knows when would I do this thing. I wonder, isn't there some indicator to do this. If its MA for example, we can choose how to calculate the MA - from Open prices, from Close prices, from High or Low. People are using highest and lowest prices often, so it sounds to me like there should be an indicator for that with the ability to select O, H, L or C... but I don't know what the name of such indicator should be. Maybe some kind of support and resistance.
There is a block "Single candle template", but as its name says, it checks how a single candle looks like and it doesn't care about any other candles. Of course, there should also be custom indicators for such candlestick patterns.
Nope, there is no easy way. Technically it can be done by modifying the project data, but who would do that
Blocks 2, 3 and 4 are placed in such a way that if one of them is true, block 5 will run. Not only that, but if two or three of them are true, block 5 will run two or three times. Well, technically you can't have the same crossover in two neighbor candles, so at least blocks 2 and 3, or 3 and 4 cannot be true at the same time.
What I really don't like is this:
Don't use == when comparing prices, because it's almost impossible to have exactly the same prices on both sides
You can try it, but in the documentation there is a function EventSetTimer() which has one input parameter for the number of seconds, and this parameter is integer.
I have seen projects with 1000s of blocks, but I have no idea how these people are able to manage their projects. In general it's better to have less blocks and to reuse them, which is not always possible.
I don't like this "Modify stops of trades" block. There is a pink block called "modify stops" that is supposed to be placed there
There is a block "Bears in a row"
I think that block 7 works. For simplicity I made it like this: 
... and without stops for the trade. This is the result:
So my EA obviously reached block 8.
Otherwise I tested your project as is, but the trade has SL and TP and every time they are reached before the crossover happens.
I always have problems understanding Google Translate, because if the question is not 100% clear to me, I don't know what to answer 
Can you draw a picture of what needs to be done?
By the way, if you are trying to make some hedging strategy... better don't
Someone can give me the the indicator with which the problem happens?