Stochastic RSI w/ Crossover Alerts (by WJ)

NOTE:
// STOCH RSI CODE TAKEN FROM DEFAULT INDICATOR
// I HAVE ONLY MADE SOME ADJUSTMENTS FOR VISUAL AID
// I MADE THIS FOR MY OWN USE BUT HAVE DECIDED TO PUBLISH AND SHARE IN CASE ANYBODY WANTS TO USE IT

This is the normal default built-in Stochastic RSI indicator which I have added some stuff for visual aid:

• Added middle line (50)
  
• Stoch RSI background turns green when K line crosses D line UPWARDS, K line is below the 50 level, and price is above 200 EMA
  
• Stoch RSI background turns red when K line crosses D line DOWNWARDS, K line is above the 50 level, and price is below 200 EMA
  

• Alert notification on the crossover candle with background colour change conditions met
  

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- Added OB/OS only crossover alerts (remember to disable the one you don't want as both are on by default)

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FIxed a mistake in upper and lower band value

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Fixed alert naming

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1. Better way to toggle alerts on/off now
2. You can now choose alerts to display with different MA filters: EMA, WMA, SMA, None.

Please let me know if there are any bugs especially on the Alerts itself.

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K line filter changed to D line instead to give a more accurate signal

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Changed it back to K line detection as it's better, apologies for the confusion and trouble of re-adding the indicator

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Changed to both K and D lines as it seems to be the best solution

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Added toggleable background colour change when k line crosses 50

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Re-publishing as I accidentally updated this with the Stochastic instead.

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Updated some stuff