what can we analyze with bid/ask sum chart.
It's simple, Bid and Ask are used to offer prices to the Buyers and Sellers of Bitcoin, they mean Buying (We are buying at) and Selling (We are selling at). This is as it is in traditional banks for foreign exchange.
i am not able to understand that what can we do with data. (also what is "within 10% range from price" term)
The percentage price range is considered when you use the full price of Bitcoin to calculate the price at which it has moved for a certain period of time.
For example, if the price of Bitcoin is at $30,000, and after a while, it moves lower to $27,000. Meaning it shed $3000. One could now say that Bitcoin dropped 10% of its price. You may then use this basis to calculate the market impact/range on any chart or market pricing board, including the one you seek.
Does the explanation help enough?