Approaching high of day

Perhaps we need more clarification on this before we can attempt any solution. Because if I read this literally, I sense that we are trying to read the future. Which is impossible given our current state of technology. The high of day, can only be determined at the close of the day. Until the close of the day we don't know what the high of day will be. And then you are asking to scan for when current price is 10 cents above the high of day. Which in itself is impossible, because at that point there is a new high of day. We have a circular reference which cannot be resolved.

So I try to reconcile this obvious detail with your request and it leaves me guessing at what you truly intended to ask. Perhaps you wanted to track the current high of day (highest value so far), then scan for when price approaches that high of day before the market closes, and for each new day the process begins from scratch.

So for the opening bar, the price will always be considered "approaching" the high of the day. Because the high of the day is contained right there within the first candle of the day. Which is clearly what you do not want, right? So this implies we need some way to define how many bars after the market opens are required before we begin checking for this signal.

I could continue on with more details that still need to be provided. But at this point I think I have given you enough ideas to help you go back to the drawing board and express your request in sufficient detail to cover all the other elements missing from your initial request.