RE: Moving average cross indicator arrow alerts.

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This is my first post here at Forex-Station. I hope I'm posting my request in the proper thread. Please go to the mql5 link above for a visual of what I am hoping to accomplish. The indicator "2MA CrossoverWithPrice.mq4" shown below is the indicator in question. It occurs to me that its useless (at least for me) to have a chart full of alert arrows when I really need is the most recent arrow on the chart. Is it possible to code the indicator so that it only shows the most recent arrow? In other words; as each new arrow is formed, the previous arrow disappears. There will therefore only be one arrow on the whole.

The SAR indicator below accomplishes a similar thing. You'll see that the indicator only shows the current dot. I only use this for trailing my stop. I don't need a chart jam-packed with unneeded dots.

I hope my request makes sense. Is it even possible to do? All help would be greatly appreciated.