RCKS,
Street smart pro S lines and R lines are this.
Uses the previous day high, low, and close price to generate a pivot line, two support levels (S1 & S2), and two resistance levels (R1 & R2). This study is only displayed on Intraday charts. In the Studies window, you may check the lines you wish to view: R2, R1, Pivot, S1, S2
Pivot Points are calculated:
Pivot = ( YesterdaysHigh + YesterdaysLow + YesterdaysClose ) / 3.0;
S1 = 2.0 * Pivot - YesterdaysHigh;
R1 = 2.0 * Pivot - YesterdaysLow;
S2 = Pivot - ( R1 - S1 );
R2 = Pivot + ( R1 - S1 );