Code in Tradingview

Hi everyone,

Does anyone know how to code in Tradingview?

I used to use ProRealtime but i have move to tradingview that is free and it has all feature and realtime charts.

The only problem is that I knew how to programme in ProReal but not in Tradingview

The indicator that I need is very simple and if someone could help me I would really appreciated:

The Indicatior is:

If Volume is bigger than on the previous bar and bar closes in top half then the indicator shows a blue bar

If Volume is bigger than on the previous bar and bar closes in bottom half then the indicator shows a red bar

The indicator appear as an Histogram

That it

Thanks for the help in advance

Code in Tradingview