Any high whether intraday or even a 1 minute high will be known only after it is over and the next price is lower. So, intraday high will be known after the whole day's trading is completed. Similar is the case with intraday low. Therefore, no indicator can tell you what is intraday high/low. If such an indicator exists, then everybody would wait to buy at intraday low and sell at day's high. In that case no trading will take place as every body is waiting to get the required price and no selling/buying takes place. Just imagine, you want to buy the newest car. Can you do it? The moment you purchase it the next car produced is the newest car. Think over it logically.
-Anant