Welcome to the Community, @Velizar and Happy New Year 
LTP is the last trade price which you see on the app. It shows the price of the most recent transaction for the product. The LTP provides a more accurate reflection of a product’s value than buy or sell prices. You can find out more here.
While we understand your point, we replaced the BID/ASK with LTP prices, which helped us introduce Extended Market Hours trading. For the time being, we don’t have any plans to change it.