WaveTrend Oscillator [Krypt]

This is similar to regular WaveTrend Oscillator except:

- replaces hlc3 input with a weighted log formula for better stability/performance on high volatility charts
- zero-centered scaling
- SMA crossovers above and below OB/OS thresholds are marked as buy/sell signals

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Use SMA curvature information to filter out buy/sell signals likely to be false positives

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Rename some chart objects

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Long/Short signal now captures some cases of bullish and bearish divergences

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Use extra signal smoothing and extra momentum check for curvature

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improve buy/sell signals

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don't make helper elements editable

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start drawing signal earlier, perform averaging on cross steps for more stable bullish/bearish divergence detection

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use a 1+2 formula for curvature

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Default to lower smoothing to still show something on the chart in the beginning

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switch back to 4 for default SMA length

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Improve sensitivity in the beginning of the chart

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add comment

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Replace final EMA smoother with Ehlers' smoother for higher sensitivity

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Ignore first candle

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reduce default smoothing slightly and allow zero smoothing

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do not count MA cross above overbought level as bottom, and likewise do not count count MA cross below oversold level as top.

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Simplify generation of buy/sell signals

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fix how continues climb/descent is determined

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detect hidden divergences

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Update colors to make this indicator suitable for either light or dark T/V color modes

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quantitatively weigh bullish and bearish signals