Here are some examples of "market calls" that were posted by participants in the "Bogleheads" investing forum. I'm not going to judge whether these were "good calls" or "bad calls" (i.e. whether they were accurate prediction), I just want to illustrate language and context. These are online postings written in casual, informal English.
(January 15, 2016) "I'm calling an Emerging Markets bottom this year. Not sure what month/day per se but sometime in 2016. This reminds me of the shoe shine boy in 1999 who is giving his customers stock tips. Twice in the past week I've heard people who are uninterested in investing talking about how Emerging Markets are going down the tubes and to avoid them. EVERYBODY now knows this. Hence the bottom is in sight. Buy buy buy.
(December 7th, 2017) "Call the top! - Bitcoin. Using winkdex.com price, guess the peak bitcoin price between now and Dec 31 2018. Guesses have to be in by Dec 31 2017 or 1 day “before the peak/crash”, whichever is earlier. I’ll guess 20,432 (but only on this forum, I’m not guessing with one penny of real money). If it crashes well before The end of 2018, we’ll identify a “tentative winner”. The prize? Honor and glory."
(September 17th, 2009) "Cramer calls top in 10, 30 year Treasuries. FWIW, Jim Cramer just called a top in 10 and 30 year US Treasuries. He advised his viewers to Sell, Sell, Sell them and put the money in FDIC-insured 18-month CDs. He also advised taking your cash out of money market accounts since the government guarantee is about to expire and put that money in CDs too."
(Notes: "Emerging markets" means the stock markets of less developed countries. Germany, Singapore, and Japan are examples of "developed markets." Brazil, Russia, and India are examples of "emerging markets." Jim Cramer is a popular TV personality with an investing show on the CNBC cable network. "Treasuries" are the sovereign bonds of the United States of America. The FDIC insures bank deposits in the United States.)