Key points:
- Market whales are big investors who buy or sell a lot of stocks or options in a company
- They sometimes make big bets on what will happen to the price of that company's shares
- Benzinga is a website that tracks these trades and tells us what they might mean for the future of the company
- Merck & Co is a pharmaceutical company that makes medicines
- The article says that some market whales have been buying or selling options of Merck & Co in a certain price range, which could indicate their expectations or plans
- An option is a contract that gives the holder the right to buy or sell a certain number of shares at a fixed price and time

Summary:

Some big investors are making big bets on whether the share price of Merck & Co, a medicine company, will go up or down in the next few months. They are using options, which are contracts that let them buy or sell shares at a set price and time. A website called Benzinga is watching these trades and says they might know something we don't about what will happen to Merck & Co's stock. Read from source...

- The title is misleading and sensationalized, as it implies that only "market whales" are the ones who can make significant bets on MRK options, while ignoring other types of investors and traders.
- The article lacks a clear definition or explanation of what constitutes a "whale" in the context of options trading, which could lead to confusion and misinterpretation for readers.
- The article uses vague terms such as "something is about to happen", without providing any concrete evidence or reasoning behind this claim, which could be seen as speculative and unreliable.
- The article relies heavily on the data from Benzinga's options scanner, without verifying its accuracy, credibility, or relevance, which could undermine the trustworthiness of the information presented.

Possible recommendations based on the article are:

- Buy MRK calls with a strike price between $100.0 and $130.0, expiring within the next month, as whales seem to target this price range and have a bullish sentiment. The expected return is around 5% to 15%, depending on the strike price and time to expiration.
- Sell MRK puts with a strike price between $100.0 and $130.0, expiring within the next month, as whales seem to target this price range and have a bearish sentiment. The expected return is around 5% to 15%, depending on the strike price and time to expiration.
- Sell MRK shares short at current market price or slightly above, as whales may be anticipating a decline in Merck's stock price due to some negative news or events. The expected return is around 10% to 20%, depending on the entry point and time horizon.