MT4 Vs MT5

 

Why do most of the Algo startup using MT4 and not MT5 ?

what is the main advantege, still, in MT4 , and why do you still using it ?

 

It was discussed many times.
Those are some key threads/posts/article which I collected related to MT4 vs MT5 :

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MQL5 vs QLUA - Why trading operations in MQL5 are up to 28 times faster? - the article 

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The Video from MQ: demonstration of the calculations on the GPU in MQL5 code and the graphics capabilities of the terminal 

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The thread - Why is it better MT5 than MT4?? Does it have fewer limitations ???

The thread - Are you ready to give up MT4 for MT5 ?

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mmfxmmfx:

Why do most of the Algo startup using MT4 and not MT5 ?

what is the main advantage, still, in MT4 , and why do you still using it ?

Only 1 important advantage really remains currently. There are a lot more brokers proposing MT4 than MT5.
Reason: