Are these two graphs isomorphic? 
Definitions:
Flash Crashes
Rapid, deep, and volatile market declines, usually occurring within a very short time period, often caused by automated trading.
New York Stock Exchange (NYSE)
The largest stock exchange in the world by market capitalization, located in New York City.
Inside Quotes
The highest bid and the lowest ask prices among various market makers or participants in a financial market for a particular security.
Limit Order Book
A record of all outstanding limit orders in a particular security, organized by price level.
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