Help me, how to use (and) to buy or sell
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I do not run these two conditions? why?
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I will suggest to not use this "AND" block - there is no need to. It should work, but it's better and faster without them. Look at the example here, the one on the left: https://fxdreema.com/demo/mt4-and-logic
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Do not run the two conditions. why? never buy or sell. why?
Could you help and modify please:
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I can see you are using custom indicators and you have crossover in all conditions. Crossovers are detected within a single candle, so you want to detect a moment when there are two crossovers at the same time in two indicators. I don't know how these indicators look and work, but I guess that the chance to detect this situation is rare. So I will suggest to use > or < for one of the indicators.
You can also check indicators with "Indicator tester" block to see if their buffers are actually giving the EA normal values.
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I do not understand, you can modify my ea, please.
I want to buy or sell when met both conditions. -
But I don't want to modify your project, I want you to know what is going on and how to modify it. That's why I explain things here, it's not that I have nothing else to do

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I want to buy or sell when met both conditions.
how is that done?
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There are conditions and conditions. In your case, both conditions are crossovers of two different indicators. But the crossover happens in one candle and then it's over. At least one of the conditions should be > or <, and I wrote about this above.
If you think that after the first condition becomes true, the second one waits to become true... this is wrong. Here is why: https://fxdreema.com/demo/mt4-wrong-closing-rule
Blocks 60 and 61 are executed on every tick, again and again. While you don't have any trade, blocks 55 and 57 are also executed on every tick. If the condition in block 55 is true, only then 62 will be executed (in the very next moment, not within seconds or minutes or hours). If the condition in block 57 is true, only then 63 will be executed.