You need this to get it done:
Action DetailsRequirements and how-to articles for Twitter's action:
A Trend to promote.
Can contain letters and numbers. Punctuation, symbols and spaces cannot be used.
Avoid excessive capitalisation.
Maximum of ~20 characters (since not every character is the same width, the actual character limit may vary slightly.)
Twitter Ads Account
A Twitter Ads account is required in order to create a Promoted Trend.
Promoted Trends currently cost $200,000 (USD) per day.
Choose the location (e.g. country/city) you wish to target.
A Promoted Tweet which is displayed at the top of the page when a user clicks on the Promoted Trend.