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  2. Scalping (trading) - Wikipedia

    en.wikipedia.org/wiki/Scalping_(trading)

    Scalping is the shortest time frame in trading and it exploits small changes in currency prices. [4] Scalpers attempt to act like traditional market makers or specialists. To make the spread means to buy at the Bid price and sell at the Ask price, in order to gain the bid/ask difference.

  3. Day trading - Wikipedia

    en.wikipedia.org/wiki/Day_trading

    Chart of the NASDAQ-100 between 1994 and 2004, including the dot-com bubble. Day trading is a form of speculation in securities in which a trader buys and sells a financial instrument within the same trading day, so that all positions are closed before the market closes for the trading day to avoid unmanageable risks and negative price gaps between one day's close and the next day's price at ...

  4. Scalping (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Scalping_(disambiguation)

    Scalping is the practice of removing the scalp of a defeated enemy as a trophy. Scalping may also refer to: Scalping (trading), in trading securities and commodities either a fraudulent form of market manipulation or a legitimate form of arbitrage; Flavor scalping, the loss of flavor in a packaged item generally due to its packaging

  5. List of datasets for machine-learning research - Wikipedia

    en.wikipedia.org/wiki/List_of_datasets_for...

    Major advances in this field can result from advances in learning algorithms (such as deep learning), computer hardware, and, less-intuitively, the availability of high-quality training datasets. [1] High-quality labeled training datasets for supervised and semi-supervised machine learning algorithms are usually difficult and expensive to ...

  6. Kelly criterion - Wikipedia

    en.wikipedia.org/wiki/Kelly_criterion

    Example of the optimal Kelly betting fraction, versus expected return of other fractional bets. In probability theory, the Kelly criterion (or Kelly strategy or Kelly bet) is a formula for sizing a sequence of bets by maximizing the long-term expected value of the logarithm of wealth, which is equivalent to maximizing the long-term expected geometric growth rate.

  7. Biostatistics - Wikipedia

    en.wikipedia.org/wiki/Biostatistics

    To answer this question with a high certainty, we need accurate results. The correct definition of the main hypothesis and the research plan will reduce errors while taking a decision in understanding a phenomenon.

  8. Strategies and skills of Jeopardy! champions - Wikipedia

    en.wikipedia.org/wiki/Strategies_and_skills_of...

    [5] [9] [10] Alex Trebek objected to this strategy, as the clues become more difficult as one moves down the board. [9] [11] The "Forrest Bounce" is a strategy, named after Chuck Forrest, in which contestants randomly pick clues to confuse opponents, as well as choosing higher-value clues from the bottom of the board.

  9. Wikipedia:Reference desk/Archives/Science/October 2005 ...

    en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

    The simple answer is that skin oils help protect your body against attack by microorganisms. Excess production can be due to many factors that vary greatly from person to person, including, but not limited to, diet, exercise, climate, medical conditions, and ethnicity.

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