A good way use in an EA is to program your own trendline, not the visual kind, but in code. You should be able to use a higher precision than what the timeframe offers.
The problem is, on the lower tf, when you draw any of the two trendline points on a bar open time that doesn't also exist on the higher timeframe, then metatrader has to adjust the point to the nearest bar on that higher tf which will throw off the slope.
The key is the bar open time.
The problem is, on the lower tf, when you draw any of the two trendline points on a bar open time that doesn't also exist on the higher timeframe, then metatrader has to adjust the point to the nearest bar on that higher tf which will throw off the slope.
The key is the bar open time.
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Has anyone noticed if you pull two trendlines which converge at a given price level in a 30 minute chart or 1hr chart and mark that convergence with a horizontal line to signify the price level they converge at, then look at it on a 4hr chart or daily chart they converge at a totaly different level sometimes hundreds of pips different ?
This means the charts are not drawing these lines properly in perspective, the implications of this in trading are enormous a lot of traders use trendlines and other line studies to project and target a future price, these inaccuracies could be the difference between making and losing huge amounts of money, metaquotes you really need to fix this.