2- Yes you can use the 10SMA-High in a scan but you would have to use the advanced scan interface, the coding would be similar to this: [close > sma(10,high)]
3- Yes the default for the SMA is the close, however you can modify that to be the, open, high, low or close. The following chart shows the 1 day SMA's for all of these along with your 10SMA-High.
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