Trend Magic Indicator for MT4 is created from combining CCI and ATR values and to help you determine Trend.
When Trend Magic Indicator turns BLUE you should consider going LONG / Bullish
When Trend Magic Indicator turns RED you should consider going SHORT / Bearish
But please be aware that do not only use this indicator to enter trades. You should use this indicator together with different indicators and strategies. It will become a much better and powerful tool when used together with other tools.