Reduced - support and resistance levels for the weak market. If the market
has closed with a large candlestick of more than 200 points, it is better to use
this calculation as a correction is expected and the market will be weak;
Normal - support and resistance levels for the medium volatility of the
market. Day candlesticks from 100 to 200 points. Normal works well during
the formation of a steady growth or decline, and candlesticks are of a similar
size;
Extended - support and resistance levels for a strong market. When the
market gets into a triangle and becomes weak, we expect that there will be a
strong move, and use the levels with the extended price range.
To decide which method of calculation to use, you should do your own
research and gather the statistics of the levels. As to me, I don't keep up with
the items described above (this is averagely for the pound). So far, I choose
methods guided by my intuition and by the expected price pattern