Missing price ticks in orderbook on S&P500 future with MarketBookGet (MT5)?

[Tiroler63]

Hi,

I want to read the orderbook for each price level/tick. On S&P500 its 0.25.

MqlBookInfo book[];

void OnBookEvent(const string &symbol)

{ 

   bool getBook = MarketBookGet(symbol, book);

}

In my DOM I see e.g.

...

3983.75
3983.5
3983.25
3983.0
3982.75
3982.5
3982.25

...

But with MQl5 in the book array many of them are missing.

...

3984.5
3983.25
3983.0
3982.0
3981.75
3980.5
3980.25

...

What I'm doing wrong?

Thanks...