A traders dynamic index or TDI in short is the only trading indicator that can read market sentiment and volatility at the same time. When an H4 ( four hour timeframe) tdi shark fin is issued, either buy pressure or sell pressure the next step is to switch to the H1 (hourly timeframe). Since we now understand that a shark fin on H4 is peak point the exponential moving averages will be there to indicate a lock of this particular point. A peak lock is seen as a 13 ema crossing a 50 ema as shown in the above image.