Klaviyo Inc. KVYO looks set to continue the trend of upbeat Wall Street debuts, as the profitable digital marketing software-as-a-service company’s stock is indicated to open up to 20% above the initial public offering price. The company said late Tuesday that its IPO of 19.2 million shares priced at $30 a share, above the expected range. The stock was expected to start trading on the New York Stock Exchange some time around midday Wednesday. An early indication from the NYSE suggests the stock will open between $34 and $36, or 13.3% to 20.0% above the IPO price. At the top of that range, the company would be valued at…